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': 'The most sensitive method for detecting cervical Chlamydia trachomatis infection is - \nSelect and explain. \nA. Direct fluorescent antibody test, B. Enzyme immunoassay, C. Polymerase chain reaction, D. Culture on irradiated McConkey cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]