(A) (NTMN)T = NTMT N is symmetric if M is symmetric and skew-symmetric if M is skew-symmetric (B) (MN−NM)T=(MN)T−(NM)T=NM−MN=−(MN−NM) skew symmetric (C) (MN)T=NTMT=NM≠MN hence NOT correct (D)standard result is adj(MN) = (adjN) (adj M)] ≠ (adjM) (adjN)
