It is found that `|A+B|=|A|`,This necessarily implies.

Options

A. (a) ` vec B= 0`
B. (b) vec A, vec B` are antiiparallel
C. (c ) ` vec A, vec B` are perpendicular
D. (d) ` vec A. vec B-lt0`

Answer

A, B

Explanation

If ` | vec A +vec B|=| vec A| `, then either ` | vec B| = 0 ` or vec A` and vec B` will be antiparallel, where | vec B| = 2 | vec A|`.