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': 'Teichoic acid is present in \nSelect and explain. \nA. Cell wall of Gram positive organisms, B. Cell wall of Gram negative organisms, C. Cytoplasm of Gram positive organisms, D. Cytoplasm of Gram negative organisms', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]