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In a certain code language, 'A + B' means 'A is the daughter of B', 'A - B' means 'A is the husband of B', 'A ├Ч B' means 'A is the brother of B' and 'A ├╖ B' means 'A is the mother of B'. Based on the above, how is K related to S if 'K ├Ч L - M + S'?
Brother-in-law
Son
Father
Grandson
Son
Break the expression into individual pairs: K*L (K is brother of L), L-M (L is husband of M), M+S (M is daughter of S). Since M is the daughter of S and L is married to M, K must be the son of S.
Break the expression into individual pairs: K*L (K is brother of L), L-M (L is husband of M), M+S (M is daughter of S). Since M is the daughter of S and L is married to M, K must be the son of S.
Analyze K * L
Given K * L means K is the brother of L. This defines K as a male sibling of L.
Analyze L - M
Given L - M means L is the husband of M. This means L is male and M is his wife (female).
Analyze M + S
Given M + S means M is the daughter of S. Since M is the wife of L, and M is the daughter of S, it follows that L is the son-in-law of S. Since K is the brother of L, K is also the son of S.
A: K is the brother of the person who is the son-in-law of S, not the brother-in-law. C: K is the son of S, and S is the parent (mother) of K, not the father. D: K is the immediate child of S, not the grandchild.
B is correct because the sequence of relations identifies K as the brother of L, and L is married to M, who is the daughter of S, making K the son of S.
In blood relation expressions, always identify the gender of the subject first using the provided definitions to narrow down options before drawing the full tree.