Mohi and Suniti working separately can do a work in 12 and 15 days, respectively. Mohi starts the work and they work on alternate days. In how many days will the work be completed?

A

$$13\frac{1}{4}$$ days

B

$$14\frac{1}{4}$$ days

C

$$12\frac{1}{4}$$ days

D

$$16\frac{1}{4}$$ days