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Vectors veca = hati+2hatj+3hatk, vec b =...

Vectors `veca = hati+2hatj+3hatk, vec b = 2hati-hatj+hatk and vecc= 3hati+hatj+4hatk` are so placed that the end point of one vector is the starting point of the next vector. Then the vectors are

A

not coplanar

B

coplanar but cannot form a triangle

C

coplanar and form a triangle

D

coplanar and can form a right-angled triangle

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The correct Answer is:
B
Note that `veca + vecb = vecc`
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