This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'Non ischaemic chest pain is caused by: \nSelect and explain. \nA. Bleomycin, B. Vincristin, C. Cyclophophamide, D. Cisplatin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: aRef: Harrison, 15"\'ed, p. 434, Table 71.2 VI', 'role': 'assistant'}]