Question

Let $a,b$ are unit vectors and $c$ is a vector of magnitude 2. If these three vectors are such that each one of them is perpendicular to the sum of the other two, then the value of a b c $|a+b+c|$ is

• A. $\sqrt{8}$
• B. $\sqrt{6}$
• C. $\sqrt{5}$
• D. $\sqrt{3}$

Answer 1

Answer: (B)

Correct answer is (b) $\sqrt{6}$