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': 'Indication of adjuvant radiotherapy in Carcinoma Endometrium are all except : \nSelect and explain. \nA. Cervical involvement, B. Lymph node involvement, C. Grade I without myometrial involvement, D. Papillary Serous tumor', 'role': 'user'}, {'content': "Answer: C \nExplanation: Pelvic postoperative radiotherapy (external) in a dose of 6000 cGy over a 6-week period is also recommended in highrisk cases such as undifferentiated tumour, myometrial infiltration, pelvic node involvement, and in serous, clear cell adenosquamous carcinoma. The postoperative radiotherapy is required in Stages IA (Grade 3), IA2, IB and II. Chemo-radiation yields a better effect. Reference : Shaw's Textbook of Gynaecology 16th edition page no 512", 'role': 'assistant'}]