The correct answer is Deputy Chairman of Rajya Sabha. Important Notes: • Deputy Chairman of Rajya Sabha presides over a joint sitting of the Parliament if neither the Speaker nor the Deputy Speaker of Lok Sabha is available. Explanation & Key Takeaways: • Joint Sitting of Parliament • The Constitution of India provides for a joint session of the Parliament. • India has a bicameral Parliament. To pass any bill, both the Houses (the Lok Sabha and the Rajya Sabha) must concur. The bill has to be passed by both Houses before the President can give his/her assent. • The founding fathers foresaw situations where there could be a deadlock between both Houses of Parliament. • Therefore, they provided for a constitutional mechanism to break this deadlock, in the form of joint sittings. • Joint Sitting of Parliament is Summoned by • The joint sitting is called by the President. • The Speaker presides over a joint sitting. In the absence of the Speaker, the Deputy Speaker of the Lok Sabha presides over it, and in his absence, the sitting is presided over by the Deputy Chairman of the Rajya Sabha. • If any of the above-mentioned people are not available, any Member of Parliament (MP) can preside over the sitting by consensus of both Houses. • The quorum to constitute a joint sitting: 1/10th of the total number of members of the House. • Joint Sitting Constitutional Provision • Article 108 of the Indian Constitution provides for a joint sitting of both Houses of Parliament. • Accordingly, a joint session can be summoned when: • If after a bill is passed by one House and transmitted to the other House – • The other House rejects this bill, or • The Houses do not agree on the amendments made to the bill, or • More than six months elapse with the bill being received by the other House without it being passed. • Then, the President can summon a joint sitting unless the bill had elapsed because of the Lok Sabha’s dissolution.