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In a certain code, 'P + Q' means P is the mother of Q, 'P − Q' means P is the brother of Q and 'P × Q' means P is the father of Q. Which of the following expressions means 'A is the paternal uncle of D'?
- AA × B − D
- BA − B × D
- CA + B − D
- DA − B + D
Correct answer: B