I'm still tossing up between dropping Economics (which I'm surprisingly doing really well in but do not enjoy studying for) and Biology (which I'm not doing so well in but am a smidge more interested in the topics to be covered during the HSC)...
It depends on what's harder and what marks I'm going to get for them post-Prelims. I've been seeing that people tend to complain about Biology more during Year 12 so I have no clue...