In a certain code, ‘A < B' means 'A is the son of B'; 'A > B’ means ‘A is the father of B’; ‘A = B’ means ‘A is the daughter of B’; ‘A ~ B’ means ‘A is the wife of B’. Which of the following expressions means that P is the sister-in-law of S?
Correct answer C. P = Q > R ~ S
Explanation
In P = Q > R ~ S, P is the daughter of Q, Q is the father of R, R is the wife of S, so P is the sister-in-law of S. The other expressions make P the daughter-in-law, brother-in-law or uncle of S.
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