Identify the incorrect statement :
(1) After the death of Rajiv Gandhi, Narasimha Rao became the Prime Minister
(2) Both the BJP and the left supported the National Front Government in 1989 as both wanted to keep Congress out of Power
(3) Manmohan Singh was the leader of the National Democratic Alliance
(4) In 1996 the Left Front and the Congress supported the United Front Government as both wanted to keep BJP out of power.

3

The only incorrect statement among the ones provided is: (3) Manmohan Singh was the leader of the National Democratic Alliance.

This is incorrect because Manmohan Singh is a member of the Indian National Congress and was the Prime Minister of India under the United Progressive Alliance (UPA) government, not the National Democratic Alliance (NDA). The NDA is a coalition that was led primarily by the Bharatiya Janata Party (BJP).