Hello aspirant!
Listen, bsc is an undergraduate degree and has many options to choose from. Also, bsc degree is not enough if you want to delve deeper into the field then you will have to pursue higher education
Coming to the point, I think that one should go with the subjects which interests them,the subject one can read for hours(years) without getting tired orboredof it. So if you are really passionate for forensic science then for you that would be the best career making option.
P. S. : if you didn't get admission in your desired stream then worry not, if you are in DU, i don't know about other colleges but in DU, they give you an option of selecting any subject of your choice and if u study that subject for 2 years then you become eligible for doing higher studies in that particular subject. That means you still have the chance to follow your dream.
Hope this helps you :)