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