The correct option is Option 1: 1 only.

The Nuclear Suppliers Group (NSG) is a group of nuclear supplier countries that seeks to contribute to the non-proliferation of nuclear weapons through the implementation of guidelines for nuclear exports and nuclear-related exports. The NSG was created in response to the Indian nuclear test in 1974, which demonstrated the need for greater controls on the transfer of nuclear technology.

Becoming a member of the NSG can have significant consequences for a country`s access to nuclear technologies. NSG members have access to the latest and most efficient nuclear technologies, which can be useful for both civilian and military purposes. Access to such technologies can significantly enhance a country`s nuclear capabilities and its ability to develop its own nuclear weapons.

However, it is important to note that NSG membership does not automatically confer membership in the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). The NPT is a separate international treaty that seeks to prevent the spread of nuclear weapons and weapons technology, promote cooperation in the peaceful uses of nuclear energy, and achieve nuclear disarmament. The NPT has 191 member states, including five nuclear-weapon states: the United States, Russia, China, France, and the United Kingdom.

While NSG membership is not a requirement for NPT membership, NPT membership is generally considered to be a prerequisite for NSG membership. This is because the NSG seeks to promote responsible nuclear behavior and the peaceful use of nuclear energy, which are also key objectives of the NPT. In addition, the NSG`s guidelines for nuclear exports are designed to complement the NPT`s non-proliferation regime.

In conclusion, becoming a member of the NSG can provide a country with access to the latest and most efficient nuclear technologies, but it does not automatically confer NPT membership. NPT membership is generally considered to be a prerequisite for NSG membership, as both organizations seek to promote responsible nuclear behavior and the peaceful use of nuclear energy.