If `|veca+ vecb| lt | veca- vecb|`, then the angle between `veca and vecb` can lie in the interval

Options

A. `(pi//2,pi//2)`
B. `(0,pi)`
C. `(pi//2,3pi//2)`
D. `(0,2pi)`

Answer

C

Explanation

`|a+b| lt |a-b|`
`implies (pi)/(2) lt theta lt (3pi)/(2)`.