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The direction ratios of a line which is...

The direction ratios of a line which is perpendicular to the two vectors ` -2bar(i) +3 bar(j) -bar(k) and 4 bar(i) +bar(j) +3 bar(k)` is

A

`1,2,-7`

B

`5,1,-7`

C

`5,2,-3`

D

`6,1,-2`

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The correct Answer is:
b
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