Hey Aspirant, After completing class 12th from PCB you have several courses options. Some of them are listed below

1. St. Joseph college Devagiri, Calicut

offering bsc in botany, computer science, mathematics,physics, psychology, chemistry and zoology.

with 3 year duration and annual fees is 3,075

2. St. Albert's college, Ernakulam, kerela

offering bsc in zoology, botany, chemistry, computer science, industrial chemistrywith 3 yearas duration and annual fees of 37,500.

3. St. Mary' College,Sulthan batheri

offering bsc in botany, zoology, mathematics and physics with 3 year duration.

4. Amrita Vishwa Vidyapeetham kochi campus, kerela

offering bscin cardiovascular technology, emergency medicine, medical laboratory technology with 3 year duration and a fees of 1,57,000.

hope this helps

good luck

Hi,
Bsc course depends on your interest. Each course has its pros and cons. There are a variety of carriers options like
Bsc Honours (Physics, Chemistry,  Botany, zoology, etc) and you can go for even higher studies taking one of these subject.
Bsc microbiology, bioinformatics, biotechnology , etc will provide you jobs in the agricultural, pharmaceuticals, medical, industrial processes and various other fields.
Bsc Agriculture, horticulture, forestry and veterinary science will provide you scope if you are interested in agriculture sector .
You can check list of colleges https://university.careers360.com/colleges/list-of-bsc-colleges-in-kerala?page=5