Question:
Which political party did Billy Hughes belong to in Dec, 1950?

Context:
 Billy Hughes is a member of the National Labor Party from Jan, 1916 to Jan, 1917. 
 Billy Hughes is a member of the United Australia Party from Jan, 1931 to Jan, 1944. 
 Billy Hughes is a member of the Liberal Party of Australia from Jan, 1944 to Oct, 1952. 
 Billy Hughes is a member of the Nationalist Party of Australia from Jan, 1917 to Jan, 1929.

Answer:
Liberal Party of Australia