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': 'Sterile pyuria may occur due to: March 2007 \nSelect and explain. \nA. Lignocaine, B. Paracetamol, C. Phenytoin, D. Cocaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Paracetamol Pyuria refers to urine which contains pus. It is defined as the presence of 10 or more neutrophils per high power field of unspun, voided mid-stream urine. Sterile pyuria is urine which contains white blood cells (pus) while appearing sterile by standard culture techniques. Sterile pyuria is listed as a side-effect from some medications such as paracetamol (acetaminophen).', 'role': 'assistant'}]