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: Unknown
[{'content': 'Contraindications of ergometrine is - \nSelect and explain. \nA. Diabetes mellitus, B. Excessive post-partum hemorrhage, C. Heart disease, D. Anaemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans: C', 'role': 'assistant'}]