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': 'Peptidoglycan layer of cell wall is thicker in: \nSelect and explain. \nA. Gram positive bacteria, B. Fungi, C. Gram negative  bacteria, D. Parasites', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Differences between Cell Wall of Gram positive and Gram negative bacteria', 'role': 'assistant'}]