Pusa Subhra is bred by hybridisation and selection for resistance to black rot and curl blight black rot, is a variety of

The correct option is B

Cauliflower

The correct option is B.

Explanation of correct option:

1. Pusa Subhra refers to a modified variety of cauliflower.
2. This specific variety resists black rot and curl blight black rot.

Explanation of incorrect options:

Option A:

1. Pusa Subhra is not a variety of chilli.
2. Pusa Sadabahar is a modified variety of chilli.

Option C:

1. Pusa Subhra is not a variety of cabbage.
2. Pusa Ageti is a modified variety of cabbage.

Option D:

1. Pusa Subhra is not a variety of wheat.
2. Pusa Tripti is one of the modified variety of wheat.

Final answer: Pusa Subhra is bred by hybridisation and selection for resistance to black rot and curl blight black rot, is a variety of cauliflower.