Raghav and Aditya can complete a work in 3 days. Aditya and Ishaan can complete the same work in 4 days. Ishaan and Raghav can complete it in 6 days. How many days will it take for Raghav, Aditya and Ishaan, combined together, to complete the same amount of work?

A

$$2\frac{4}{5}$$

B

$$3\frac{2}{3}$$

C

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

D

$$2\frac{2}{3}$$