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If a=2hati-3hatj+hatk,b=-hati+hatk,c=2ha...

If `a=2hati-3hatj+hatk,b=-hati+hatk,c=2hatj-hatk`, then the area (in sq units) of parallelogram with diagonals a+b and b+c will be

A

`sqrt(21)`

B

`2sqrt(21)`

C

`(1)/(2)sqrt(21)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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