* Mayankote Kelath Narayanan is the National Security Advisor to Prime Minister Manmohan Singh.
* He was appointed as NSA on January 25, 2005.
* He offered to resign on November 30, 2008 over Mumbai terror strikes but his resignation was not accepted by Prime Minister Manmohan Singh.
* Narayanan headed the Intelligence Bureau from 1987 to 1990.
* Narayanan is an expert in security matters and a specialist on Sri Lankan affairs.