The number of sides of two regular polygons are in the ratio `5:4`. The difference between their interior angles is `9^(@)`. Consider the following statements :
1. One of them is a pentagon and the other is a rectangle.
2. One of them is a decagon and the other is an octagon.
3. The sum of their exterior angles is `720^(@)`.
Which of the above statements is/are correct ?

Options

A. A)1 only
B. B)2 only
C. C)1 and 3
D. D)2 and 3