Which of the following is true regarding the Vice-Chairman of the Rajya Sabha ? [Railway Apprentices 1993]

• A. One has to be a member of the Rajya Sabha for election to die post of the Vice-Chairman
• B. One need not necessarily be a member of the Rajya Sabha for election to the post of the Vice-Chairman
• C. One has to be a member of either House 'of Parliament for election to the post of the Vice-Chairman
• D. There is an established convention that the Vice-Chairman of the Rajya Sabha belongs to the main opposition party in the Rajya Sabha