Number of pens in five shops M1, M2, M3, M4 and M5 are compared. Number of pens in M3 are more than only M1. No two shops have same number of pens. Number of pens in M5 are less than M2 but more than M4. Number of pens in M5 are more than how many shops?
1
1
2
3
3
2
4
4