Hello!

Entrance exam for engineering consists of 3 subjects, Physics, Chemistry and Mathematics, and all 3 subjects are compulsory . If you have studied mathematics in your 12th then you can choose both PCB and PCM. Math and Biology exams are usually held at different times. If you have not studied mathematics as a core or compulsory subject in 11th and 12th, you can take a separate math board exam and clear too . But math is compulsory for CET in engineering.