If ‘A ₹ B’ means ‘A is the father of B’, ‘A @ B’ means ‘A is the mother of B’, ‘A ! B’ means ‘A is the wife of B’, then which of the following means ‘T is the grandmother of U’?

A

T @ R ₹ y ! U

B

T @ S ₹ U ! y

C

T @ R ! S ! U

D

None of these