The correct option is A Only 1, 3 & 4
NSG was set up in 1974 .It is a multinational body of 48 nuclear supplier countries that seeks to contribute to the non-proliferation of nuclear weapons through the implementation of two sets of Guidelines for nuclear exports and nuclear-related exports. It reduces the nuclear proliferation by controlling the export and re-transfer of materials that may be applicable to nuclear weapon development and by improving safeguards and protection on existing materials.
Extra Info:
China has opposed India’s bid to get NSG membership on the ground that it was yet to sign the NPT. It had said all the multilateral non-proliferation export control regime including the NSG have regarded NPT as an important standard for the expansion of the NSG. And hence, members of the Nuclear Suppliers Group should be party to NPT. The NSG is an ad hoc export control regime and France, which was not an NPT member for some time, was a member of the NSG since it respected NSG’s objectives