Explanation

Five educational films A, B, C, D, and E are to be shown to a group of students. The films are to be shown in a particular order, which conforms to the following conditions: 

A must be shown earlier than C.  B must be shown earlier than D.  E should not be the fifth film shown.

Question:

Which among the following is an acceptable order for showing educational films?

A) A, C, B, D, E

B) A, C, D, E, B

C) B, D, C, A, E

D) B, D, E, A, C

****** other explanations****

First E should not be the fifth film shown. so options (a) & (c) not possible. A must be shown earlier than C, so first A and after than C. According to this order options (c) is also not possible. Now take B must be shown earlier than D. so according to this order option (b) cancelled. So option D is only correct.