Question: If a, b, c and d are unit vectors such that (axb). (cxd)=1 and a c = =, then 2 (A) a, b, c

If a, b, c and d are unit vectors such that (axb).

If a, b, c and d are unit vectors such that (axb). (cxd)=1 and a c = =, then 2 (A) a, b, c are non-coplanar (C) 5, d are non-parallel (B) b, c, d are non-coplanar (D) a, d are parallel and b, care parallel

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