If the points represented by complex num...

If the points represented by complex numbers `z_(1)=a+ib, z_(2)=c+id " and " z_(1)-z_(2) ` are collinear, where `i=sqrt(-1)`, then

A

ad+bc=0

B

ad-bc=0

C

ab+cd=0

D

ab-cd=0

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The correct Answer is:

B

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