A selection committee is to be chosen consisting of 5 ex-technicians. Now there are 12 representatives from four zones. It has further been decided that if Mr.X is selected, Y and Z will not be selected and vice-versa. In how many ways it can be done?

A selection committee is to be chosen consisting of 5 ex-technicians.

1.	A selection committee is to be chosen consisting of 5 ex-technicians. Now there are 12 representatives from four zones. It has further been decided that if Mr.X is selected, Y and Z will not be selected and vice-versa. In how many ways it can be done?
A.	72
B.	72
C.	72
D.	72
Answer» C. 72