Which of the following is part of communism but not socialism?

A. central planning

B. government controlled services

C. authoritarian government

D. government controlled resources

Correct answer: C. An authoritarian government is a fundamental part of the communism but not socialism

The correct answer would be C - authoritarian government.

When you think about socialism, you quickly see that central planning and government controlled services, as well as government controlled resources are all things that are common to socialism while authoritarian governments here are actually a part of communism!