Let p be a 2x 2complex matrix such that p*p is the dentity matrix, where p*is the conjugate transpose pf p. then, the eigenvalues of p are a) real b) complex co

Let P be a 2x 2complex matrix such that P*P is the dentity matrix, where P*is the conjugate transpose pf P. Then, the eigenvalues of P are a) real b) complex conjugates of each other c) reciprocals of each other d) of modulus 1