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
Simple squamous epithelium is seen in? 
Select and explain. 
A. Blood vessel, B. Thyroid folicle, C. Esophagus, D. Hard palate
A: Blood vessel
Answer: A: Blood vessel 
Explanation: Ans. (a) Blood vessel