Question: Who presides over the sessions of lok sabha?

Disambiguated questions and answers:
context: The Speaker of Lok Sabha is both a member of the House and its Presiding Officer. The Speaker conducts the business in the House. He/she decides whether a bill is a money bill or not. He/she maintains discipline and decorum in the house and can punish a member for their unruly behaviour by suspending them. He/she permits the moving of various kinds of motions and resolutions like the motion of no confidence, motion of adjournment, motion of censure and calling attention notice as per the rules. The Speaker decides on the agenda to be taken up for discussion during the meeting. It is the Speaker of the Lok Sabha who presides over joint sittings called in the event of disagreement between the two Houses on a legislative measure. Following the 52nd Constitution amendment, the Speaker is vested with the power relating to the disqualification of a member of the Lok Sabha on grounds of defection. The Speaker makes obituary references in the House, formal references to important national and international events and the valedictory address at the conclusion of every Session of the Lok Sabha and also when the term of the House expires. Though a member of the House, the Speaker does not vote in the House except on those rare occasions when there is a tie at the end of a decision. Till date, the Speaker of the Lok Sabha has not been called upon to exercise this unique casting vote. While the office of Speaker is vacant due to absence/resignation/removal, the duties of the office are performed by the Deputy Speaker or, if the office of Deputy Speaker is also vacant, by such member of the House of the People as the President may appoint for the purpose. The Lok Sabha has also a separate non-elected Secretariat staff.
question: Who primarily presides over the sessions of the Lok Sabha?
short_answers: Speaker
wikipage: Lok Sabha

context: The joint sitting of the Parliament is called by the President (Article 108) and is presided over by the Speaker or, in his absence, by the Deputy Speaker of the Lok Sabha or in his absence, the Deputy-Chairman of the Rajya Sabha. The Chairman doesn't preside over the joint session at any means/cost.
question: Who presides over the sessions of Lok Sabha in the absence of the Speaker?
short_answers: Deputy Speaker of the Lok Sabha
wikipage: Joint Session of the Parliament of India

context: The joint sitting of the Parliament is called by the President (Article 108) and is presided over by the Speaker or, in his absence, by the Deputy Speaker of the Lok Sabha or in his absence, the Deputy-Chairman of the Rajya Sabha. The Chairman doesn't preside over the joint session at any means/cost.
question: Who presides over the sessions of Lok Sabha in the absence of the Speaker and the Deputy Speaker of the Lok Sabha?
short_answers: Deputy-Chairman of the Rajya Sabha
wikipage: Joint Session of the Parliament of India

Long answers:
knowledge: content: The Lok Sabha, or House of the People, is the lower house of India's bicameral Parliament, with the upper house being the Rajya Sabha.
wikipage: Lok Sabha
long_answer: Who presides over the Lok Sabha's sessions depends on who is absent. Lok Sabha's Speaker primarily presides over its sessions. In the Speaker's absence, the Deputy Speaker of the Lok Sabha does. In the absence of both, the Deputy-Chairman of the Rajya Sabha, the upper house of India's Parliament, presides over the sessions of the Lok Sabha, the lower house of India's Parliament.