Question

Which of the following are not permanent wind ?
a ) Trade winds
b ) Monsoon winds
c ) Westerlies

Answer 1

There are types of permanent winds:
Trade Winds – These are permanent winds flowing from east-to-west. It flows in the Earth's equatorial region (between 30°N and 30°S latitudes).
Easterlies – It is a prevailing wind blowing from the east. ...
Westerlies – These are prevailing winds that flow from the west towards the east.

Answer 2

Monsoon winds is the answer