The correct answer is: Neither 1 nor 2.
The first statement is incorrect because the India-Africa Summit held in 2015 was the fourth such summit. The first India-Africa Summit was held in New Delhi in 2008, the second in Addis Ababa in 2011, and the third in New Delhi in 2013.
The second statement is also incorrect because the India-Africa Summit was not initiated by Jawaharlal Nehru in 1951. The idea for a summit between India and Africa was first proposed by Indian Prime Minister Manmohan Singh in 2005.
The India-Africa Summit is a biennial meeting between the leaders of India and Africa. The summit is aimed at strengthening the ties between the two regions and promoting cooperation in areas such as trade, investment, and development.