Hello maam, ma’am  it depends on which BSC hons you are intrested in.. so tht can i help you with the subjects

still as by assuming i have given the details below

For bsc hons zoology botany microbiology you need to carry physics chemistry and biology 

For bsc physics chemistry electronic instrumentation you need to carry maths chemistry and physics 

If you still have a query do ask me.. 

all the best