Exp) Option (c) is the correct answer.

Statement a is correct. The Single Transferable Vote system (STV) is followed for Rajya Sabha elections.

Statement b is correct. Every State has a specific quota of seats in the Rajya Sabha. The members are elected by the respective State legislative assemblies. Hence, option b) is correct.

Statement c is incorrect. The eligibility conditions have been changed since 2003 as of now the candidate has to be an elector in a parliamentary constituency anywhere in India.

Statement d is correct. Every voter is required to rank candidates according to her or his preference. To be declared the winner, a candidate must secure a minimum quota of votes.