question_answer

If i, j, k are unit vectors, then                          [MP PET 2001]

A)             i . j \[=\]1

B)             i . i \[=\]1

C)             \[\mathbf{i}\times \mathbf{j}=1\]

D)             \[\mathbf{i}\times (\mathbf{j}\times \mathbf{k})=1\]