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

Options

A. not coplanar
B. coplanar but cannot form a triangle
C. coplanar and form triangle
D. coplanar and can form a right - angled triangle

Answer

C

Explanation

`[{:(veca = hati + 2hat j + hat3k), (vecb = 2hat i - hatj + hatk), (vecc = 3hati + hatj + 4 hatk):} " " implies vecc = veca + vecb`