Sanjya and Saumya together can finish a work in 9 days. Sanjya can do the same job on his own in 15 days. The same work Saumya can do by himself in:

A

$$14$$ days

B

$$15\frac{1}{2}$$ days

C

$$22\frac{1}{2}$$ days

D

$$22$$ days