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If a = 2 hati + j - 3 hatk , b = hati -...

If ` a = 2 hati + j - 3 hatk , b = hati - 2 hatj + 3hatk` ,
`c = - hati + hatj - 4hatk ` and ` d = hati + hatj + 2hatk `, then ` (a xx b) xx ( c xx d) ` =

A

` - 7hati + hatj + 3hatk `

B

` 8 hati - 36 hatj + 60 hatk `

C

`5 hati + hatj - hatk `

D

`-8 hati - 36 hatj + 12 hatk `

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The correct Answer is:
B
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