Chirag hardly ever cooks, . . . . . . ?

Answer: Option D

Chirag hardly ever cooks, does he?

This is an example of a question tag. When the main statement is negative, the question tag must be positive. In this case, "hardly ever" implies a negative meaning, so the correct question tag is positive: "does he".

Option A: isn’t he is incorrect because it is used for a different type of sentence, typically referring to the verb "to be" rather than an action like cooking.

Option B: he doesn’t is incorrect because it's not a proper question tag; it repeats the negative form of the sentence, which is not appropriate in this context.

Option C: doesn’t he is incorrect because it's a negative question tag, and we need a positive tag here due to the negative implication of "hardly ever."

Conclusion: The correct answer is Option D: does he, as it follows the rule of using a positive question tag after a negative statement.