The vertices A, B, C and D of a quadrilateral ABCD lie on a circle. `angle A` is thrice `angle C` and `angle D` is twice `angle B`. What is the difference between the measures of `angle B` and `angle C`?

Options

A. `15^(@)`
B. `28^(@)`
C. `18^(@)`
D. `20^(@)`

Answer

A