Eigenvalues for a matrix a satisfying

Question

Question:

Eigenvalues for a matrix A satisfying A²=-A

Let A be an nxn matrix such that A²=-A. Then the possible values of the eigenvalues of A are

i) 0, ii) 1, iii)-1, iv) i, v) -i

A. i) and ii) only
B. i) and iii) only
C. iv) and v) only
D. i), iii), iv), and v)
E. All of these