The volume of a tetrahedron whose vertic...

The volume of a tetrahedron whose vertices are `4hati+5hatj+hatk,-hatj+hatk,3hati+9hatj+4hatk` and `-2hati+4hatj+4hatk` is (in cubic units)

A

`(14)/(3)`

B

5

C

6

D

30

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B

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