In a certain code, ‘A * B’ means ‘A is the son of B’; ‘A & B’ means ‘A is the mother of B’; ‘A ! B’ means ‘A is the sister of B’; ‘A ? B’ means ‘A is the wife of B’. Which of the following expressions means that P is the brother of S?
Correct answer A. P * Q & R ! S
Explanation
In P * Q & R ! S, P is the son of Q, Q is the mother of R, R is the sister of S, so P is the brother of S. The other expressions make P the uncle, aunt or sister-in-law of S.
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