After the first day's intense deliberations at the NSG meeting and a special briefing by India on its sidelines for the member countries, New Delhi said it was ‘tough game’ but expressed optimism about getting the exemption.

The grouping, that controls international nuclear trade, will meet again on Friday for discussions on the crucial issue amid indications that there could be no decision during the two-day-long deliberations and another meeting may be called soon after to take the final view.

Assembling amid continued reservations of at least three members, the NSG considered a draft of the waiver, moved by the US, which is to be adopted by the grouping by consensus.

After the first session of the NSG meet, India held a special briefing for all the NSG countries conveying its commitments towards non-proliferation and seeking to allay fears that some members have.

Representatives of Austria, New Zealand and Switzerland questioned why India should be granted the waiver as they raised issues related to Non-Proliferation Treaty and testing, sources said.