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
Selective medium for Gonococci rpt 
Select and explain. 
A. Thayer - main medium, B. LJ medium, C. DCA medium, D. MacConkey's medium
A: Thayer - main medium
Answer: A: Thayer - main medium 
Explanation: Question repeated.