This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Anatomy
[{'content': 'Simple squamous epithelium is seen in? \nSelect and explain. \nA. Blood vessel, B. Thyroid folicle, C. Esophagus, D. Hard palate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Blood vessel', 'role': 'assistant'}]