For u = v = w =1 , both lines satisfies the relation

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Q 2127212181.     Suppose direction cosines of two lines are given by ul + vm + wn = 0 and al^2 + bm^2 + cn^2 = 0, where u, v, w, a, b, c are arbitrary constants and l, m, n are direction cosines of the lines.
For u = v = w =1 , both lines satisfies the relation
A

(b+c) (n/l)^2 +2b (n/l) + (a+b) =0

B

(c+a) (l/m)^2 +2c (l/m) + (b+c) =0

C

(a+b) (m/n)^2 +2a (m/n) + (c+a) =0

D

All of the above

#### HINT

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