A boy born in tribe B
Explanation:
A boy born in tribe B (say X), can have a son, daughter, son-in-law or daughter-in-law only if he is married. When he marries, he moves to tribe A. Also, his daughter always remains in tribe A (as it is her mother’s tribe). Hence, a boy born in tribe B cannot have his daughter in tribe B.
Hence, option (a) is eliminated.
The son of X will be in tribe A (till marriage). When he marries, this son and daughter-in-law will be in tribe B. Hence, X cannot have his daughter-in-law in tribe A.
Hence, option (b) is eliminated.
If this married son gets divorced, he moves back to his mother’s tribe i.e. tribe A. Hence, X cannot have a divorced son in tribe B.
Hence, option (d) is eliminated.
Hence, option (c).
Note:
You need not check option 3. However, it can be verified as under:
If the boy is born in tribe B, his mother and her brother will also be in tribe B. This uncle will remain in tribe B before marriage and move to tribe A after marriage.
Hence, a boy born in tribe B can have an uncle in any tribe.
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