If a and b are two vectors such that a . b = 0 and \[\mathbf{a}\times \mathbf{b}=\mathbf{0},\] then [IIT Screening 1989; MNR 1988; UPSEAT 2000, 01]

If a and b are two vectors such that a . b = 0 and \[\mathbf{a}\times

1.	If a and b are two vectors such that a . b = 0 and \[\mathbf{a}\times \mathbf{b}=\mathbf{0},\] then [IIT Screening 1989; MNR 1988; UPSEAT 2000, 01]
A.	a is parallel to b
B.	a is perpendicular to b
C.	Either a or b is a null vector
D.	None of these
Answer» D. None of these

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If a and b are two vectors such that a . b = 0 and \[\mathbf{a}\times \mathbf{b}=\mathbf{0},\] then [IIT Screening 1989; MNR 1988; UPSEAT 2000, 01]

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