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A body is under the action of three forces `vecF_(1),vecF_(2)` and `vecF_(3)`. In which case the body cannot undergo angular acceleration ? .

A

`vecF_(1),vecF_(2)` and `vecF_(3)` are concurrent, point of concurrence beign centre of mass .

B

`vecF_(1)+vecF_(2)+vecF_(3) =0`

C

`vecF_(1),vecF_(2)` is parallel to `vecF_(3)` but the three forces are not concurrent .

D

`vecF_(1)` and `vecF_(2)` act at the same point but `vecF_(3)` acts at different point .

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The correct Answer is:
A
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