This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infections of the genital tract, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following cannot be detected by wet film ? \nSelect and explain. \nA. Candida, B. Trichomonas, C. Chlamydia, D. Bacterial vaginosis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Diagnosis of chlamydial infections nucleic acid amplification by PCR Chlamydial Antigenby ELISA Tissue cultures D.C.DUTTA'S TEXTBOOK OF GYNAECOLOGY,Pg no:150,6th edition", 'role': 'assistant'}]