i am deon. i just finished my 10th and have opted for science in but i dont know what to choose between science and biology.

i guess you mean to say maths and biology. anyways. see taking both will be a beter option as you can decide and go anyway after your 12th, but the negative part is that it becomes hectic. taking biology alone is also not a good way as the scope od medical and opportunities are limited whereas for M

if you are going for +2SCIENCE then choose maths with phy,che . bcoz in future you can apply for engineering and also it will help you to apply for GOVT JOBs like psc,etc..