Explanation:

- The Pro-tem Speaker of the Lok Sabha is appointed to conduct the proceedings of the house before the election of the Speaker. The Pro-tem Speaker also administers the oath of office to the newly elected members.

- Option 1, Meira Kumar, was a former Speaker of the 15th Lok Sabha, not a Pro-tem Speaker for the 16th Lok Sabha.

- Option 2, M Thambidurai, is a prominent Indian politician, but he was not the Pro-tem Speaker for the 16th Lok Sabha.

- Option 3, Kamal Nath, was indeed the Pro-tem Speaker of the 16th Lok Sabha and administered the oath to the newly elected members in 2014.

- Option 4, Manohar Parrikar, was the former Chief Minister of Goa and held various positions but was not the Pro-tem Speaker.