Explanation:

? Mud volcanoes range from small, centimeter-sized structures to large edifices up to a few hundred meters high and several kilometers across. ? Mud volcanoes erupt predominantly water, hot mud, slurries, and gases. They occur in regions where high sedimentation rates and fine-grained materials allow high pore pressures to develop. ? Large mud volcanoes erupt from depths of several hundred meters to more than a couple kilometers. ? In India Mud Volcanoes are found in the Andaman Islands of Diglipur and Baratang. The Baratang mud volcano is the most popular one visited by tourists and is quite active in terms of eruption. Locals have named this volcano 'Jalki'. ? Hence, option (a) is the correct answer.