Anil, Abhay and Sanjay can complete a piece of work in 10 days, 12 days and 15 days respectively. All of them started working together but Anil left after working for 2 days and Abhay left 3 days before the completion of work. How long did the work lasts?

A

7 days

B

6 days

C

9 days

D

None of these