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 following statements are true regarding Chlamydia except - \nSelect and explain. \nA. Erthromycin is effective for therapy of Chamydial infections, B. Their cell wall lacks a peptidoglycan layer, C. They can grow in cell free culture media, D. They are obligate intracellular bacteria', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]