If $$t_1$$ is the time elapsed between 11.10 am to 3.50 pm: and if $$t_2$$ is the time elapsed between 10.15 am to 4.05 pm, then $$t_1 : t_2 =$$

A

5 : 4

B

2 : 3

C

4 : 5

D

3 : 2