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: Gynaecology & Obstetrics
Which of the following cannot be detected by wet film? 
Select and explain. 
A. Candida, B. Trichomonas, C. Chlamydia, D. Bacterial vaginosis
C: Chlamydia
Answer: C: Chlamydia 
Explanation: diagnosis of chlamydial infections

nucleic acid amplification by PCR 
Chlamydial Antigenby ELISA,
Tissue cultures