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Let `vec u=hat i+hat j,vec v=hat i-hat j and vec w=hat i+2 hat j+3hat k`.If `hat n` is a unit vector such that `vec u*hat n=0 and vec v*hat n` then `|vec w*hat n|` is equal to

A

`1`

B

`2`

C

`3`

D

`0`

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The correct Answer is:
C
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