Topic: verb (ক্রিয়া),

Best Answer Explained in Below-:

The phrase "Mary had John --- the car" requires a specific grammatical structure that indicates what action John is to perform regarding the car. The most fitting option is "c: wash," which aligns with the intended meaning of the sentence.

When using the verb "had" in this context, it typically conveys that Mary arranged for or caused John to take some action. In this case, "had John wash the car" implies that Mary wanted John to perform the action of washing the car. This structure, often referred to as the causative form, requires the base form of the verb (i.e., "wash") following "had."

The other options do not fit as well:
- A) "would wash" implies a conditional or future action that could occur but lacks the assertive command or request intended by Mary.
- B) "to wash" suggests intention rather than action.
- D) "to be washed" implies passivity, which doesn't align with the direct request for John to actively perform the task.

Therefore, "c: wash" accurately captures the meaning of the request, making it the correct choice.