Question:
Who was the head of Romania in Jan, 1946?

Context:
 Ludovic Orban is the head of the government of Romania from Nov, 2019 to Dec, 2020. 
 Dimitrie Sturdza is the head of the government of Romania from Apr, 1897 to Apr, 1899. 
 Ștefan Golescu is the head of the government of Romania from Nov, 1867 to May, 1868. 
 Octavian Goga is the head of the government of Romania from Dec, 1937 to Feb, 1938. 
 Nicolae Rădescu is the head of the government of Romania from Dec, 1944 to Feb, 1945. 
 Constantin Sănătescu is the head of the government of Romania from Aug, 1944 to Dec, 1944. 
 Ion Emanuel Florescu is the head of the government of Romania from Mar, 1891 to Dec, 1891. 
 Armand Călinescu is the head of the government of Romania from Mar, 1939 to Sep, 1939. 
 Dacian Cioloș is the head of the government of Romania from Nov, 2015 to Jan, 2017. 
 Mihai Tudose is the head of the government of Romania from Jun, 2017 to Jan, 2018. 
 Dimitrie Ghica is the head of the government of Romania from Nov, 1868 to Jan, 1870. 
 Ion Ghica is the head of the government of Romania from Dec, 1870 to Mar, 1871. 
 Nicolae Golescu is the head of the government of Romania from May, 1868 to Nov, 1868. 
 Gheorghe Tătărescu is the head of the government of Romania from Jan, 1934 to Dec, 1937. 
 Mugur Isărescu is the head of the government of Romania from Dec, 1999 to Dec, 2000. 
 Ion Gheorghe Maurer is the head of the government of Romania from Mar, 1961 to Feb, 1974. 
 Mihail Kogălniceanu is the head of the government of Romania from Oct, 1863 to Jan, 1865. 
 Mihai Răzvan Ungureanu is the head of the government of Romania from Feb, 2012 to May, 2012. 
 Dimitrie Brătianu is the head of the government of Romania from Apr, 1881 to Jun, 1881. 
 Ion Gigurtu is the head of the government of Romania from Jul, 1940 to Sep, 1940. 
 Nicolae Iorga is the head of the government of Romania from Apr, 1931 to Jun, 1932. 
 Victor Ponta is the head of the government of Romania from May, 2012 to Nov, 2015. 
 Radu Vasile is the head of the government of Romania from Apr, 1998 to Dec, 1999. 
 Sorin Grindeanu is the head of the government of Romania from Jan, 2017 to Jun, 2017. 
 Gheorghe Argeșanu is the head of the government of Romania from Sep, 1939 to Sep, 1939. 
 Lascăr Catargi is the head of the government of Romania from Dec, 1891 to Oct, 1895. 
 Adrian Năstase is the head of the government of Romania from Dec, 2000 to Dec, 2004. 
 Constantin Bosianu is the head of the government of Romania from Jan, 1865 to Jun, 1865. 
 Manolache Costache Epureanu is the head of the government of Romania from May, 1876 to Aug, 1876. 
 Take Ionescu is the head of the government of Romania from Dec, 1921 to Jan, 1922. 
 Viorica Dăncilă is the head of the government of Romania from Jan, 2018 to Nov, 2019. 
 Ion G. Duca is the head of the government of Romania from Nov, 1933 to Dec, 1933. 
 Gheorghe Gheorghiu-Dej is the head of the government of Romania from Jun, 1952 to Oct, 1955. 
 Nicolae Văcăroiu is the head of the government of Romania from Nov, 1992 to Dec, 1996. 
 Miron Cristea is the head of the government of Romania from Feb, 1938 to Mar, 1939. 
 Florin Cîțu is the head of the government of Romania from Dec, 2020 to Nov, 2021. 
 Petru Groza is the head of the government of Romania from Mar, 1945 to Jun, 1952. 
 Manea Mănescu is the head of the government of Romania from Feb, 1974 to Mar, 1979. 
 Chivu Stoica is the head of the government of Romania from Oct, 1955 to Mar, 1961. 
 Ion C. Brătianu is the head of the government of Romania from Jun, 1881 to Mar, 1888. 
 Emil Boc is the head of the government of Romania from Dec, 2008 to Feb, 2012. 
 Constantin Dăscălescu is the head of the government of Romania from May, 1982 to Dec, 1989. 
 Călin Popescu-Tăriceanu is the head of the government of Romania from Dec, 2004 to Dec, 2008. 
 Theodor Stolojan is the head of the government of Romania from Oct, 1991 to Nov, 1992. 
 Nicolae Ciucă is the head of the government of Romania from Nov, 2021 to Dec, 2022. 
 Constantin Argetoianu is the head of the government of Romania from Sep, 1939 to Nov, 1939. 
 Victor Ciorbea is the head of the government of Romania from Dec, 1996 to Apr, 1998. 
 Nicolae Crețulescu is the head of the government of Romania from Jun, 1865 to Feb, 1866. 
 Petre S. Aurelian is the head of the government of Romania from Dec, 1896 to Apr, 1897. 
 Alexandru G. Golescu is the head of the government of Romania from Feb, 1870 to Apr, 1870. 
 Petre Roman is the head of the government of Romania from Dec, 1989 to Oct, 1991. 
 Theodor Rosetti is the head of the government of Romania from Mar, 1888 to Mar, 1889. 
 Ilie Verdeț is the head of the government of Romania from Mar, 1979 to May, 1982. 
 Barbu Catargiu is the head of the government of Romania from Feb, 1862 to Jun, 1862.

Answer:
Petru Groza