Hello,

Firstly you will have to decide that in future what you wanted to pursue. This is very crutial time in which you will have to make decision of your future. If your interest is to become doctor, engineer, architechture, scientists, etc. Than go for maths and biology. 

And if you wanted to pursue Ca, cs, acturial or anything different than go for commerce.

All the best. Both fields are very good, just choose according to you interest.