If the pair of lines ax^2 +2 (a + b) xy ...

If the pair of lines `ax^2 +2 (a + b) xy + by^2 =0` lie along diameters of a circle and divide the circle into four sectors such that the area of one of the sectors is thrice the area of another sectors, then:

A

`3a^2+2ab+3b^2=0`

B

`3a^2+10ab+3b^2=0`

C

`3a^2-2ab+3b^2=0`

D

`3a^2-10ab+3b^2=0`

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The correct Answer is:

A

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