Question:
Who was the chair of Croatian National Bank in Dec, 1991?

Context:
 Željko Rohatinski is the chair of Croatian National Bank from Jul, 2000 to Jul, 2012. 
 Marko Škreb is the chair of Croatian National Bank from Jan, 1996 to Jan, 2000. 
 A. Čičin-Šain is the chair of Croatian National Bank from Aug, 1990 to Jan, 1992. 
 Pero Jurković is the chair of Croatian National Bank from Jan, 1992 to Jan, 1996. 
 Boris Vujčić is the chair of Croatian National Bank from Jul, 2012 to Dec, 2022.

Answer:
A. Čičin-Šain