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In each paragraph 2 multiple choice questions have to be answered. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.
Let p be an odd prime number and Tp be the following set of 2 X 2 matrices:
The number of A in Tp such that A is either symmetric or skew-symmetric or both, and det(A) divisible by p is