Hello

For mass communication you should complete your 12th with atleast 45%to 50%. So that you can eligible for many colleges .

Since every colleges have there own cutoff and many reputated college select candidates on the basis of 12th percentage.

Some of the popular university like KIIT university,  BHU conduct entrance exam and also some college also conduct group discussion and personal interviews before allotment of seats.

Feel free to ask

Good Luck....