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For non-coplanar vectors a, b and c, abs...

For non-coplanar vectors a, b and c, `abs((a times b)*c)=abs(a) abs(b) abs(c)` holds if and only if

A

`a.b = b.c = c.a =0`

B

`a.b. = b.c =0`

C

`b.c = c.a = 0`

D

`c.a = a.b = 0`

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A
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