There is a question in the test "Who's Andy?" Is it correct to answer "He is your brother"? I mean it's kind of strange to say YOUR (like if somebody doesn't' know his\her brother). "Sister" seems like not a full answer and other variants are obviously incorrect).
A. He your brother.
B. He is your brother.
C. Sister.
D. He brother.
E. He is your sister.
Only B is correct, although I agree that it sounds odd.
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