The correct answer is option 4, which states that statement 1 and 2 are correct. Now, let`s dissect each option to understand why the other options are incorrect.

Option 1 states that statement 1 only is correct. However, this is not accurate since both statements 1 and 2 are correct according to the correct answer.

Option 2 states that statement 2 and 3 are correct. While statement 2 is indeed correct, statement 3 is not. The Nuclear Suppliers Group (NSG) does not have South Africa as the only country from Africa. Therefore, option 2 is incorrect.

Option 3 suggests that all statements 1, 2, and 3 are correct. As discussed, statement 3 is incorrect, so option 3 cannot be the correct answer.

Lastly, option 4 correctly identifies that statement 1 and 2 are correct. It is important to note that the NSG guidelines are implemented by each participating government in accordance with its national laws (statement 1). Additionally, the NSG guidelines do facilitate the development of nuclear trade (statement 2). Hence, option 4 is the correct answer.

In conclusion, option 4 is the correct answer as it accurately states that statements 1 and