If O is a point on the circle and P is a point in the exterior of the circle. Length of ¯OP¯ = 7.5 cm and radius of the circle is 5.5 cm. What will be the length of ¯QP¯, if Q is the centre?
A 5.5 cm
B 13 cm
C 7.5 cm
D 13.5 cm
7.5 plus 5.5 is 13