Ramu and Mohan can separately complete a work in 10 hours and 16 hours, respectively. After working for 2 hours together, Mohan leaves the work. In how many hours will Ramu finish the remaining work?

A

$$6\frac{1}{4}$$

B

$$6\frac{3}{4}$$

C

$$5\frac{3}{4}$$

D

$$7\frac{3}{4}$$