A) 1
B) 3
C) ? 3
D) 0
Correct Answer: B
Solution :
\[\mathbf{i}\,.\,(\mathbf{j}\times \mathbf{k})+\mathbf{j}\,.\,(\mathbf{k}\times \mathbf{i})+\mathbf{k}.(\mathbf{i}\times \mathbf{j})\]=\[\mathbf{i}\,.\,\mathbf{i}+\mathbf{j}\,.\,\mathbf{j}+\mathbf{k}\,.\,\mathbf{k}=3.\]
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