This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carcinoma Ovary, 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: Ans. is d, i.e. Carcinoid Tumors of ovaryRef: Shaw 15th/ed, p378Carcinoid tumor of Ovary:* It is sometimes primary and sometimes metastatic.* Also called Argentaffinoma.* Occurs as a malignant change in benign dermoid cyst.* Presence of solid yellow tumor with histological property of reducing silver salts derived from specialized Kulchitsky cells of intestine.* It produced 5 - HT which causes attacks of flushing and cyanosis.Q', 'role': 'assistant'}]