O4 let v be the vector space over r consisting of all n xn real matrices for some fixed integer n. which of the following subsets of v are subspaces of v. (a) t

O4 Let V be the vector space over R consisting of all n xn real matrices for some fixed integer n. Which of the following subsets of V are subspaces of V. (A) The set S consisting of all n x n symmetric matrices. The set T consisting of alln xn skew-symmetric matrices. The setU consisting of all nxn non-singular matrices. (B) (C) (D) None of these