Once you attempt the question then PrepInsta explanation will be displayed.
If D is Male, the answer is Nephew.
If D is Female, the answer is Niece.
As the sex of D is not known, hence, the relation between
D and A cannot be determined.
Note: Niece - A daughter of one\'s brother or sister, or of one\'s
brother-in-law or sister-in-law. Nephew - A son of one\'s
brother or sister, or of one\'s brother-in-law or sister-in-law.
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