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: Forensic Medicine
[{'content': 'Alkalinisation of urine may be done in cases of poisoning with: \nSelect and explain. \nA. Barbiturates, B. Amphetamines, C. Alcohol, D. Morphine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Achieving a urinary pH of 7.5 to 9 promotes excretion of drugs that are weak acids such as long acting barbiturates (phenobarbital). Ref: The Essentials of Forensic Medicine and Toxicology By Dr K S Narayan Reddy, 27th Edition, Pages 456, 519; Parikh's Textbook of Medical Jurisprudence and Toxicology, 6th Edition, Page 8.17; Modi's Medical Jurisprudence and Toxicology, 23rd Edition, Page 17; KDT, 6th Edition, Page 392", 'role': 'assistant'}]