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IF bar a = hati + hatj +2 hatk , bar ...

IF ` bar a = hati + hatj +2 hatk , bar b = 2 hati - hatj +hatk and bar c = 3 hati - hatk and bar c = m bara + n barb ` then `m+ n =`

A

0

B

1

C

2

D

`-1`

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The correct Answer is:
C
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