Two lines `(x-x_(i))/(l_(i))=(y-y_(i))/(m_(i))=(z-z_(i))/(n_(i)), (i=1 – InterviewSolution

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1.	Two lines `(x-x_(i))/(l_(i))=(y-y_(i))/(m_(i))=(z-z_(i))/(n_(i)), (i=1,2)` are perpendicular to each other, if their direction ratios satisfyA. `(l_(1))/(l_(2))=(m_(1))/(m_(2))=(n_(1))/(n_(2))`B. `l_(i)=m_(i)=n_(i)`C. `l_(1)l_(2)+m_(1)m_(2)+n_(1)n_(2)=-1`D. `l_(1)l_(2)+m_(1)m_(2)+n_(1)n_(2)=0`
Answer» Correct Answer - D

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