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
Teichoic acid is present in cell walls of 
Select and explain. 
A. Gram positive bacteria, B. Gram negative bacteria, C. Yeast, D. Protozoa
A: Gram positive bacteria
Answer: A: Gram positive bacteria 
Explanation: None