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We propose construction of a unique and definite metric ($\eta_+$),time-reversal operator (T) and an inner product such that the pseudo-Hermitianmatrix Hamiltonians are C, PT, and CPT invariant and PT(CPT)-norm is indefinite(definite). Here, P and C denote the generalized symmetries : parity andcharge-conjugation respectively. The limitations of the other currentapproaches have been brought out.Comment: No Fig, 13 pages, E-mail: zahmed@apsara.barc.ernet.i

C-,PT- andCPT-invariance of pseudo-Hermitian Hamiltonians