'R - S' means 'R is the brother of S'
'R # S' means 'R is the daughter of S'
'R * S' means 'R is the father of S'
'R $ S' means 'R is the wife of S'
If 'W $ X - Z * Y', then how is W related to Z?
W $ X - Z * Y à W is the wife of X, X is the brother of Z, and Z is the father of Y. Since X and Z are brothers W is X’s wife, it means W is the sister-in-law of Z. Hence, the correct answer is (A).
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