Hey !

The entrance exam for  mass communication in BHU PET covers the following topics;

Current affairs and general knowledge

Language Proficiency including Proficiency in English Language

Logical Quantitative

Analytical Abilities

Aptitude (inferences from percentages, tables, graphs, etc.) 

The level of paper is  not so hard. So , if you just cover the main concepts of these topics , then its also sufficient for you to get good marks.

Hope it helps!