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: Medicine
[{'content': 'Non ischaemic chest pain is caused by - \nSelect and explain. \nA. Bleomycin, B. Vincristinum, C. Cyclophosphamide, D. Cisplatinum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]