What subject should I drop? (1 Viewer)

[lohtus]

I am currently in year 11 and doing
-Extension English
-Advanced English
-Extension Mathematics
-Advanced Mathematics
-Chemistry
-Biology
-Economics
-Modern History

I really like Modern History and it is my best subject. I quite like English Extension as well. I am struggling with Chemistry but I am kind of thinking of doing Dentistry or Medicine but I am not 100% sure on a University degree yet. Mathematics Extension is also quite challenging and Biology and Economics are okay.
Thanks in advanced