Botanical name of red chili is

Explanation :- 

The common name of Capsicum fruitescene is wild chili paper.

It belongs to the family Solanaceae.

The common name of Capsicum annum is sweet pepper, red chili, or chili pepper.

It belongs to the family Solanaceae.

Physalis also belongs to the family Solanaceae and its common name is cape gooseberry.

Withania's common name is ashwagandha. 

Final answer :- 

The correct answer is Capsicum annum , i.e option (B).