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Two lines (x-x(i))/(l(i))=(y-y(i))/(m(i)...

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 satisfy

A

`l_i=m_i=n_i`

B

`l_1l_2+m_1m_2+n_1n_2=0`

C

`l_1//l_2=m_1//m_2=n_1//n_2`

D

None of these

Text Solution

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The correct Answer is:
B
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