Manmohan Singh refused to elaborate further Saturday, saying 'pending a debate in parliament, it is inappropriate to answer any specific questions on the issue'. All he would say was: 'We have all the relevant answers.'

The prime minister also dismissed the reported difference of opinion between the government and Congress party on the issue as a 'media creation'.

He was speaking to journalists at Rashtrapati Bhavan after the presentation of the Indira Gandhi Prize for Peace, Disarmament and Development to The Bill and Melinda Gates Foundation. President Pratibha Patil presented the award to Microsoft founder and IT tycoon Bill Gates.