Some of answers to MCQ's are wrong.

1. Opposite of Private law is not Common law. Common law refers to the origin of certain laws derived from custom. Private law applies to citizen-citizen dealings. Public law is its opposite since it applies to citizen-state dealings.

2. Single Transferable vote system hasnt been suggested by JS Mill, who had only written on the subject. It was devised by Hare.

3. As for the question regarding communism- the question itself is so ambivalent. Plato was the first person to have gone on record about communism. Karl Marx was probably the 2nd most famous one. Scholars vary regarding which one is the founder. So perhaps, the question could have been better framed and its beliefs specifically pronounced since there are some differences in both the ideas of communism.