Explanation:

- Nor'westers: These are violent thunderstorms occurring in parts of India and Bangladesh, mainly during pre-monsoon months. They are not known for being hot and dry.

- Mango showers: These are pre-monsoon rainfall events in southern India, known for being beneficial to the mango crop. They aren't hot, dry winds.

- Blossom showers: These are occasional spells of rain in Kerala and Karnataka during the hot season, which help coffee flowers to bloom.

- Loo: This is the correct answer. Loo refers to the strong, hot, and dry winds that blow during summer months in the northern plains of India, including the areas between Delhi and Patna.