He had . . . . . . . . one-rupee note.

The correct answer is D. no article.

A one-rupee note is a common object, so it is not necessary to use an article with it. In fact, using an article would sound strange in this context.

The other options are incorrect because they all imply that the one-rupee note is unique or specific. For example, "a" one-rupee note implies that there are other one-rupee notes, but the speaker is not specifying which one. "An" one-rupee note implies that the one-rupee note is new or unusual. And "the" one-rupee note implies that the speaker is referring to a specific one-rupee note that is known to both the speaker and the listener.

In this case, the speaker is simply saying that the man had a one-rupee note. It is not necessary to specify which one-rupee note he had, or whether it was new or unusual. Therefore, the correct answer is D. no article.