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Which of the following statements are TRUE?

P.The eigenvalues of a symmetric matrix are real

Q.The value of the determinant of an orthogonal matrix can only be +1

R.The transpose of a square matrix **A **has the same eigenvalues as those of A

S.The invese of an ‘n x n’ matrix exists if and only if the rank less than ‘n’

- P and Q only
- P and R only
- Q and R only
- P and S only