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': "Attacks of flushing and cyanosis occur in which type of ovarian tumors: \nSelect and explain. \nA. Struma ovarii, B. Krukenberg's tumor, C. Arrhenoblastoma, D. Carcinoid tumors of ovary", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Carcinoid tumour of Ovary:\n• It is sometimes primary and sometimes metastatic.\n• Also called Argentaffinoma.\n• Occurs as a malignant change in benign dermoid cyst.\n• Presence of solid yellow tumour with histological property of reducing silver salts derived from specialized Kulchitsky cells of intestine.\n• It produced 5 - HT which causes attacks of flushing and cyanosis.', 'role': 'assistant'}]