Hello aspirant

According to me, you must prepare maths well and if you have not prepared for physics , don't worry as you don't have to qualify each subject separately. If you have prepared chemistry well, revise it and try to get 100 % result . Even if you will prepare two subjects very well you can get the qualifying marks . Else you can do the most important topics of maths first . At this time don't be panic. Have faith and write the paper with confidence.

Good luck!