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Consider the following information and answer the question given below:
. 'P # Q' means 'P is the father of Q';
. 'P + Q' means 'P is the mother of Q';
. 'P - Q'means 'P is the brother of Q';
. 'P * Q' means 'P is the sister of Q'.
Given, A + B # C - D, then A is D's
A + B implies A is mother of B.
B # C implies B is the father of C. This means that A is grandmother of C.
C - D implies C is brother of D which means that A is the grandmother to D also.
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