The pie chart given below shows the number of shirts bought by Pankaj in 6 consecutive months. Number of shirts in a month are shown as a percentage of total number of shirts bought by Pankaj in these 6 months.

Which of the following statement is correct?

I. Number of shirts bought in M1 are 50 percent more than the number of shirts bought in M2

II. Total central angle formed by M3, M4 and M6 is 189.2 degrees

III. Ratio of number of shirts bought in M4 to the number of shirts bought in M2 is 2 ∶ 1