If the lines 2x + 3y + 1 = 0 and 3x – y – 4 = 0 lie along diameters of a circle of circumference 10π, then the equation of the circle is
(a) x2 + y2 + 2x + 2y – 23 = 0
(b) x2 + y2 – 2x – 2y – 23 = 0
(c) x2 + y2 – 2x + 2y – 23 = 0
(d) x2 + y2 + 2x – 2y – 23 = 0.