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: Microbiology
[{'content': 'Prozone phenomenon is seen with- \nSelect and explain. \nA. Same concentration of antibody and antigen, B. In antigen excess to antibody, C. Antibody excess to antigen, D. Hyperimmune reaction', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]