The angle between the lines represented ...

The angle between the lines represented by the equation `ax^(2)+xy+by^(2)=0` will be `45^(@)` if

A

(a) `a=1,b=6`

B

(b) `a=1,b=-6`

C

(c) `a=6,b=1`

D

(d) `a=1,b=1`

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The correct Answer is:

B

NA

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