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': 'Red degeneration of fibroid is due to : \nSelect and explain. \nA. Thrombosis of the veins, B. Infection, C. Gangrene, D. Rupture of capsules', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Thrombosis of the veins', 'role': 'assistant'}]