The correct answer is option 3: India. In December 2007, India successfully launched an interceptor missile called AAD-02 to intercept a ballistic missile. It is important to understand the context of this event. Ballistic missiles are long-range weapons that are designed to carry nuclear, chemical, or conventional warheads. Intercepting these missiles is a crucial aspect of modern defense systems.

Option 1: Iran. While Iran is known for its missile program, there is no specific evidence to suggest that they launched an interceptor missile to intercept a ballistic missile in December 2007.

Option 2: North Korea. Similar to Iran, North Korea has been involved in developing ballistic missiles. However, there is no record of them launching an interceptor missile to intercept a ballistic missile in December 2007.

Option 4: Pakistan. Like India, Pakistan is also developing its own missile defense systems. However, there is no information or evidence indicating that Pakistan launched an interceptor missile in December 2007.

In conclusion, the correct answer is India, as they launched an interceptor missile called AAD-02 in December 2007 to intercept a ballistic missile.