Question

In which countries the term Western Disturbance is used to describe an extra tropical storm originating in the Mediterranean Sea?
A- India
B- Pakistan
C- Afghanistan and Nepal
D- All the above

Answer 1

Hint:
An extratropical storm originating in the Mediterranean area that brings sudden winter rain to the sections it affects is a western disturbance. Dense clouding and heavy precipitation can sometimes be caused by the monsoon trough's association with western disturbances.
One such interaction is said to be the result of the 2013 North India floods, which killed more than 5000 people in a period of 3 days.

Complete answer:
In India, Pakistan, Afghanistan and Nepal, Western disturbances originate from the Mediterranean Sea and are called by this name.
It is a non-monsoonal, westerly-driven precipitation trend. Typically, the humidity in these storms comes from the Mediterranean Sea, the Caspian Sea and the Black Sea.

Therefore the answer is D

Note
After winter, Western disturbances start decreasing in numbers. They pass through North India during the summer months of April and May. In the northern Himalayan zone, the southwest monsoon current generally progresses from east to west, unlike western disturbances that follow a west to east pattern in north India with a consequent increase in pressure carrying cold air pools. In some parts of northwest India, this assists in the triggering of monsoons. It also triggers pre-monsoon precipitation in northern India in particular.
In the northern parts of Pakistan, where flooding is recorded multiple times during the winter season, the strongest western disturbances generally occur.