If 3x^(2)+18xy+by^(2)=0 represents a pai...

If `3x^(2)+18xy+by^(2)=0` represents a pair of lines,
making an angle `pi` with each other, then `b=`

A

(a) 3

B

(b) 9

C

(c) 27

D

(b) 81

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The correct Answer is:

C

NA

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