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a is perpendicular to both b and c. The ...

a is perpendicular to both b and c. The angle between b and c is `(2pi)/(3)`. If `|a| = 2, |b| = 3, |c| = 4`, then `a(b xx c)` =

A

`18sqrt(3)`

B

`12sqrt(3)`

C

`8sqrt(3)`

D

`6sqrt(3)`

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The correct Answer is:
B
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