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The correct answer is option 3, which means both statement 1 and statement 2 are correct. Let`s dissect each option to understand why.
Option 1: "1 only". This option states that only statement 1 is correct. However, this is incorrect because both statement 1 and statement 2 are correct.
Option 2: "2 only". This option states that only statement 2 is correct. However, this is also incorrect because both statement 1 and statement 2 are correct.
Option 3: "Both 1 and 2". This option correctly identifies that both statement 1 and statement 2 are correct. The CTBT does indeed come into force only if all nuclear capable countries sign it. Additionally, Iraq and India are two countries that have not signed the treaty.
Option 4: "Neither 1 nor 2". This option states that both statement 1 and statement 2 are incorrect. However, this is incorrect because both statement 1 and statement 2 are actually correct.
In conclusion, the correct answer is option 3 because both statement 1 and statement 2 are correct.