This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basics of genetics, Subject name: Biochemistry
[{'content': 'Lac operon is: \nSelect and explain. \nA. Repressor, B. Inducer, C. Operator, D. Activator', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lac operon Inducible operon Because at first it is suppressed most of the times If required it can be induced/Activated.', 'role': 'assistant'}]