Explanation:

• The depressions which form in the monsoon season are called the monsoon depressions. These are lowpressure areas with two or three closed isobars which cause most of the monsoon rains. These can be of Bay origin, Land origin or Arabian Sea origin.
• Their shape is roughly elliptical and their horizontal extension is about 1000s of Kms of the surface. Its vertical extension is about 6-9 km.
• A monsoon depression is a cold core system over the surface and in the lower levels and a warm core in the upper levels The monsoon depressions tilt southwards with height and if a monsoon depression is moving westward, the heavy rainfall is mainly concentrated in the SW quadrant.
• Due to the high vertical wind shear present during the Southwest monsoon season, monsoon depressions generally do not intensify into cyclonic storms. Hence, option (c) is the correct answer.