The given question is about the "Ring of Fire" and we need to identify the correct statements about it.

Statement 1: It is also known as the circum-Pacific belt of volcanoes.

This statement is correct. The Ring of Fire is a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur. It is often referred to as the circum-Pacific belt of volcanoes due to the high concentration of volcanoes in this region.

Statement 2: It is an active seismic zone.

This statement is correct. The Ring of Fire is known for its high seismic activity. It is an area where several tectonic plates meet, leading to a lot of earthquakes and volcanic activity. It is considered one of the most seismically active zones in the world.

Statement 3: It is a zone of divergent plate margin.

This statement is incorrect. The Ring of Fire is primarily associated with convergent plate boundaries where tectonic plates collide or subduct beneath another plate. This leads to the formation of volcanoes and earthquakes.

Therefore, the correct answer is option 2: 1 and 2 only.

Alert - correct answer should be option 2.