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The resultant of two vectors vec(A) and ...

The resultant of two vectors `vec(A)` and `vec(B)` is perpendicular to the vector `vec(A)` and its magnitude is equal to half of the magnitude of vector `vec(B)` (figure). The angle between `vec(A)` and `vec(B)` is

A

`120^(@)`

B

`150^(@)`

C

`135^(@)`

D

None of these

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The correct Answer is:
B
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