Comprehension Passage
Directions: Study the following information carefully and answer the questions given below:
A certain number of persons are standing in a row facing north. Information about only some of them is known.
Three persons stand between O and E. C stands to the immediate left of O. Two persons stand between F and A. Number of persons standing between M and W is one less than the number of persons standing to the left of W. E stands at an end. The number of persons standing between F and Z is the same as the number of persons standing between W and Z. M stands third to the right of Z. Six persons stand between A and Z and A stands at an end.
How many persons are standing in the row?
1
23
2
19
3
21
4
17
5
18