Polar easterlies are which kind of winds?

Correct option is B

The correct answer is (b), permanent winds.
Polar easterlies are the dry, cold prevailing winds that blow around the high-pressure areas of the polar highs at the North and South Poles. Unlike the westerlies in the middle latitudes and trade winds in the tropics, the polar easterlies are often weak and irregular.
The polar easterlies are one of the five primary wind zones, known as wind belts, that make up our atmosphere's circulatory system. This particular belt of wind begins at approximately 60 degrees north and south latitude and reaches the poles.
Polar easterlies are permanent winds because they are caused by the Earth's rotation and the difference in temperature between the poles and the equator.