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: Biochemistry
[{'content': 'Which of the following is false regarding Amestest \nSelect and explain. \nA. Salmonella typhimurium is used, B. Mutated bacteria fail to grow in absence of histidine, C. It is used for testing mutagens, D. Developed by Bruce. N. Ames in 1970s', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mutated bacteria can grow even in the absence of Histidine.', 'role': 'assistant'}]