This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Indication of adjuvant radiotherapy in Ca endometrium is/are:a) Cervical involvementb)  Lymph node involvement c) Carcinoma in situd) Papillary serous tumore) Estrogen receptor positive \nSelect and explain. \nA. abc, B. bc, C. acd, D. bcd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Indications of adjuvant radiotherapy:\n\nExtrauterine extension.\nLower uterine or cervical involvement.\nPapillary serous or clear cell histology.\nPoor histologic differentiation (Grade Ill).\nMyometrial penetration greater than 1/2 of thickening.\nPelvic node involvement.\n\nTumor positive for estrogen receptors suggest well differentiated disease, So no adjuvant radiotherapy is recommended', 'role': 'assistant'}]