A sum of ₹x amounts to ₹9,246 in 4 years and to ₹11,298.75 in $$7\frac{1}{2}$$ years, at y% p.a. simple interest. The values of x and y are, respectively:

A

6900 and 8.5

B

6800 and 8.5

C

6500 and 8

D

7200 and 7.5