The correct answer is B. To administer oath to the new members.
The Speaker Pro-tem is a temporary presiding officer of the Lok Sabha, the lower house of the Parliament of India. The Speaker Pro-tem is appointed by the President of India on the advice of the Prime Minister. The Speaker Pro-tem’s main duty is to administer the oath of office to the newly elected members of the Lok Sabha. The Speaker Pro-tem also presides over the first few sessions of the Lok Sabha until a new Speaker is elected.
Option A is incorrect because the Cabinet is a body of ministers appointed by the Prime Minister to aid and advise the President. The Speaker Pro-tem does not have any role in uniting the Cabinet.
Option C is incorrect because the Speaker Pro-tem does not have the power to end the session of the Lok Sabha. The power to end the session rests with the President of India.
Option D is incorrect because the Speaker Pro-tem does not have the power to break a deadlock in the Lok Sabha. The power to break a deadlock rests with the President of India.