A, B, C work one after the other in that order. Each can finish a work individually in 10, 16, 12 days, respectively. After working for 3 such cycles ABC, ABC, ABC, then A and C leave the work. B alone will complete the rest of the work in:
1
4(1/5) days
2
1(4/5) days
3
5(4/5) days
4
5(1/4) days