Consider the following activities in a student life.
A: Examinations
B : Convocation
C : Admission
D : Results
E : First Class
If the sequence of occurrance of these activities is arranged in the reverse order, then the correct one in the given options is

A: Examinations
B : Convocation
C : Admission
D : Results
E : First Class

So the main order will be first his/her admission will be done, then examinations will be conducted followed by his/her results in a class (First, second, third etc) and finally degree will be awarded which is convocation.

Hence the correct order is CADEB

Then reverse order is

B : Convocation

E : First Class

D : Results 

A: Examinations

C : Admission