1.

If \[\mathbf{i},\,\mathbf{j},\,\mathbf{k}\] are the unit vectors and mutually perpendicular, then \[[\mathbf{i}\,\mathbf{k}\,\mathbf{j}]\] is equal to [RPET 1986]

A. 0
B. ? 1
C. 1
D. None of these
Answer» C. 1


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