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Let a,b,c be distinct non-negative numbe...

Let a,b,c be distinct non-negative numbers. If the vector `ahati+ahatj+chatk,hati+hatk and chati+chatj+bhatk` lie in a plane, then c is

A

The Geometric Mean of a and b

B

The Arithmetic Meanofaand b

C

Equal to zero

D

The Harmonic Mean of a and b

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The correct Answer is:
A
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