Hello Trishaa,

In KCET exam it's your wish . You can either attend PCB or PCM. If you want to join for engineering you can appear for PCM only , if you are interested in doing Bsc or any biology involved courses you should attend PCB.If you have attended all PCMB exams, no worries you will get the separate ranks for engineering, Bsc agri, BVS(Bachelor of Veterinary science) and Bpharma respectively.

There is no rule by KEA that you need to attend all the exams.

For more details regarding kcet marks vs rank go through following link;

https://engineering.careers360.com/articles/kcet-marks-vs-rank

All the best!