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: Pharmacology
[{'content': 'Nitrates are not used in - \nSelect and explain. \nA. CCF, B. Esophageal spasm, C. Renal colic, D. Cyanide poisoning', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Renal colic Uses of nitrates Angina pectoris MI CHF and acute LVF --> nitroglycerine i.v. can be used Act by decreasing preload (LV filling pressure). Biliary colic and esophageal spasm (achalasia cardia) Acute coronary syndrome (unstable angina and non-ST segment elevation Ml). Cyanide poisoning", 'role': 'assistant'}]