The average of 13 numbers is 65. The average of first three numbers is 63 and that of next numbers is 64.5. The $$11^{th}$$ number is 2 more than the $$12^{th}$$ number but less than the $$13^{th}$$ by 2.5. What is the average of $$11^{th}$$ and $$12^{th}$$ number?

A

67.5

B

67

C

65.5

D

65