A fraction is such that when 5 is added to the numerator then its value is 1, again when 6 is added to the denominator then the value is $$\frac{1}{2}$$
The fraction is

A

$$\frac{16}{21}$$

B

$$\frac{13}{18}$$

C

$$\frac{11}{16}$$

D

$$\frac{18}{23}$$