Question

‘A = B’ means ‘A is the father of B‘. ‘A $ B’ means ‘A is the sister of B’. ‘A * B’ means ‘A is the mother of B‘. ‘A ? B’ means ‘A is the son of B‘. If M ? C $ J * Z, then how is J related to M?

A Sister
B Mother's sister
C Mother's mother
D Brother
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