Point P(2, 1) and Q(4, 3) lying on chord AB of circle with center O(k, 5) and radius 7 unit. P is the mid point of chord AB. Equation of circle is:
1
(x - 3)2 + (y - 5)2 = 49
2
(x + 3)2 + (y - 5)2 = 49
3
(x - 2)2 + (y - 5)2 = 49
4
(x + 2)2 + (y - 5)2 = 49