lt the pair of lines ax2 + 2(a + b)xy + by2 + 0 lie along diameters of a circle and divide the circle into four sectors such that the area of circle into four sectors such that the area of another sector, then ,
(a) 3a2 + 2ab + 3b2 = 0
(b) 3a2 + 10ab + 3b2 =0
(c) 3a2 - 2ab + 3b2 = 0
(d) 3a2 - 10ab+ 3b2 = 0
