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P and Q are married to each other. P is the father of M. M is the husband of T. Q is the mother of L. L is the mother of O. How is L related to M?
Wife
Sister
Brother
Husband
Sister
Quick Trick: Q is mother of L, and L is mother of O. Thus, L is a female in the second generation. Since P and Q are married and P is father of M, M and L are siblings having the same parents (P and Q). Since L is female, L is the Sister of M.
Q is mother of L, and L is mother of O. Thus, L is a female in the second generation. Since P and Q are married and P is father of M, M and L are siblings having the same parents (P and Q). Since L is female, L is the Sister of M.
Analyze Gen 1 (Parents)
P and Q are married to each other. Since P is the father of M, P is Male. Q is married to P, so Q is Female. Together, (P, Q) are the parent couple.
Analyze Gen 2 (Children and Gender of M and L)
P is the father of M, which means M is a child of P and Q. M is the husband of T, which establishes that M is Male. Q is the mother of L, which means L is also a child of P and Q. L is the mother of O, which establishes that L is Female.
Deduce Relationship between L and M
Both M and L share the same parents (P and Q). M is Male and L is Female. Therefore, L is the sister of M.
A: Wife is incorrect because M's wife is T, not L; L is M's sibling. C: Brother is incorrect because L is female (mother of O). D: Husband is incorrect because L is a female.
B is correct because L and M share the same parents (P and Q), and since L is female (mother of O), L is the sister of M.
In Blood Relation questions, always explicitly determine the gender of each person from statements like 'husband of T' (makes M male) and 'mother of O' (makes L female) before finalizing relations like brother vs sister.