The correct option is option 3, which states that statements 1, 2, and 4 are correct.

Let`s break down each statement to understand why they are correct:

1. It is an active volcanic realm: This statement is correct. The circum-pacific belt, also known as the Pacific Ring of Fire, is a region with high volcanic activity. It is characterized by a large number of active volcanoes, including famous ones like Mount Fuji in Japan and Mount Rainier in the United States.

2. It is an active seismic realm: This statement is also correct. The circum-pacific belt is known for its high seismic activity. It experiences frequent earthquakes, especially along the western coasts of North and South America, and around the Pacific Plate boundaries.

3. It is a divergent plate boundary: This statement is not mentioned in the options and therefore is not correct.

4. It is prone to Tsunami: This statement is correct. The circum-pacific belt is highly prone to the occurrence of tsunamis. This is due to the presence of subduction zones along the Pacific Plate boundaries, where one tectonic plate is forced beneath another, causing the displacement of water and the potential for large oceanic waves.

Overall, the correct statements