For two vectors A and B, |bar(A) + bar(B)| = |bar(A) - bar(B)| is always true when (i) |bar(A)| = |bar(B)| ne 0(ii) A bot B (iii) |bar(A)| = |bar(B)| ne 0 and A and B are parallel or anti parallel (iv) When either A or B is zero.

For two vectors A and B, |bar(A) + bar(B)| = |bar(A) - bar(B)| is alwa

1.	For two vectors A and B, \|bar(A) + bar(B)\| = \|bar(A) - bar(B)\| is always true when (i) \|bar(A)\| = \|bar(B)\| ne 0(ii) A bot B (iii) \|bar(A)\| = \|bar(B)\| ne 0 and A and B are parallel or anti parallel (iv) When either A or B is zero.
Answer» (i) and (II) are true ii, iii and iv are true i, ii and C are true ii and iv are true ANSWER :D