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The vector(s) which is/are coplanar with...

The vector(s) which is/are coplanar with vectors `hat(i)+hat(j)+2hat(k) and hat(i)+2hat(j)+hat(k)` are perpendicular to the vector `hat(i)+hat(j)+hat(k)` is are

A

`hat j- hat k `

B

` - hat i + hat j`

C

`hat i - hat j`

D

`jat j + hat k`

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