Inorganic- NCERT enough ! Organic- Its a vast topic and understanding each intricate detail in +2 is not that feasible for medical. Best is to take a guidance of a teacher who can choke out the imp ones and save your valuable time. However, if it interests you surely you can go for the books !

Physical- its more about sums ! Having a clear concept is crucial but at same time one should also be able to solve questions. So, try practising problems of engineering levels too !

Good Luck