Hey Vini, i will help you out with this.as you are enquiring about this i suppose you are already pursuing your mbbs. USMLE has multiples resources that you can prepare for , like KAPLAN,BECKER,PATHOMA,DIT,PICMONICS,SKETCHY MICRO PHARM,and qbanks like UWORLD, QMAX,KAPLAN and books like BRS ,HI yield and many more.basically its up to u to choose what u like or want, like how some like tripathi for pharm but some hate it and like tara or katsun. it basically comes to individual preference.but always start and end with NBME to assess yourself and also use FIRST AID,and UWORLD as your core resources. good luck buddy