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if veca=3hati+2hatj+2hatk and vecb=hati+...

if `veca=3hati+2hatj+2hatk` and `vecb=hati+2hatj-2hatk` then a vector of magnitude 12, which is perpedicular to both `veca+vecb` and `veca-vecb` is

A

`4(2hati+2hatj+hatk)`

B

`4(2hati+2hatj-hatk)`

C

`4(hati-2hatj-2hatk)`

D

`4(2hati+hatj+2hatk)`

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The correct Answer is:
B
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