(Choose 1 answer)
Which of the following sets are orthogonal?
(i) {[1, -2, 0, 3], [2, 1, 0, 0], [0, 0, 1, 1]}
(ii) {[1, 0, 0], [0, 1, 0], [0, 1, 1]}
(iii) {[1, -1, 3], [-2, 1, 1], [4, 7, 1]}
A. (iii)
B. (ii)
C. All of the other choices are incorrect
D. (i)
(13)
