The correct answer is option 2 - "to freedom guaranteed to citizens only." This means that the right to form associations and unions is a right that is specifically guaranteed to citizens, and not to everyone.

Option 1 suggests that this right is guaranteed to everybody, which is not correct. The right to form associations and unions is not universally applicable to every individual, but rather limited to citizens.

Option 3 states that this right is related to equality before the law, which is not accurate. While the right to form associations and unions may be related to the concept of equality, it is not explicitly guaranteed as a right to equality before the law.

Option 4 refers to the right to life and personal liberty, which is unrelated to the right to form associations and unions.

In summary, the correct answer is option 2 because the right to form associations and unions is specifically guaranteed to citizens only, and not to every individual.