The former Uttar Pradesh chief minister told reporters here that Modi is a popular leader of the country, "who is voice of the people".
He termed the Gujarat Chief Minister as 'vikas purush'.
On the reports of differences within the NDA over Modi, the Kurmi leader said that tagging him as communal was baseless.
"Gujarat riots were only a reaction of Godhara incident and every action has a reaction," he said.
More From This Section
The former CM, however, said that BJP's PM candidate would be decided by the parliamentary board, and said,"I hope that it would also keep public sentiment into consideration."
On reports of JPC giving clean chit to Prime Minister in its draft report on 2G scam, Singh said that Manmohan Singh could be termed as "honest".
On a question that recent praise of L K Advani by SP supremo Mulayam Singh Yadav signalled towards the alliance between the two parties, Singh said that the senior BJP leader does not need certificate from anyone.
In reply to another question, Kalyan said that alliance with SP, BSP and Lok Dal was BJP's "mistake" which will not be repeated again.