1.

\[(\mathbf{b}\times \mathbf{c})\times (\mathbf{c}\times \mathbf{a})=\]                 [MP PET 1997]

A. [b c a] a
B. [c a b] b
C. [a b c] c
D. [a c b] b
Answer» D. [a c b] b


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