This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'In a post operative case of early stage endometrial cancer, radiation is advised in \nSelect and explain. \nA. Stage 1A Grade I, B. Stage IA Grade II, C. Stage IA Grade III, D. All the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: MANAGEMENT OF EARLY DISEASESURGERYMinimally invasive simple hysterectomy with bilateral salpingo-oophorectomy Peritoneal cytologySentinel lymph node mapping POST OPERATIVE RADIOTHERAPYSTAGEGRADE 1/2GRADE 3Stage IAObservationIVStage IBIVIM versus IV + CTStage II IV IM versus IV + CTStage IIIMIM versus IV + CTIV: Intravaginal radiationIM: Intensuty modulated radiation therapyCT: Chemotherapy; Carboplatin + PaclitaxelReference: Novak's gynecology; 14th edition; Chapter 35; Uterine cancer", 'role': 'assistant'}]