This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': "Selective medium for Gonococci is \nSelect and explain. \nA. Thayer - main medium, B. LJ medium, C. DCA medium, D. Macconkey's medium", 'role': 'user'}, {'content': "Answer: A \nExplanation: Selective media for gonococci is Thayer - Main media. It contains vancomycin, colistin and nystatin. These antimicrobials will suppress the growth of other organisms which inhibits the growth of Meningococci. Reference: Textbook of Microbiology; Anathanarayan and panicker's; 10th edition; Page no: 231", 'role': 'assistant'}]