Combine the following pairs of sentences by making use of participles:
Nanak met his brother in the street. He asked him where he was going. [Advanced]
Since the first action happened before the second, a participle form of the gerund, that is, having+participle, hence , Option A is correct. The rest of the options do not express the previous occurrence of one action before the other, use the wrong sequence of words, or do not use a participle, hence these are incorrect.