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: Dental
Cells of the stratum intermedium secretes: 
Select and explain. 
A. Hyaluronic acid., B. Acid phosphatase., C. Alkaline phosphatase., D. All of the above.
C: Alkaline phosphatase.
Answer: C: Alkaline phosphatase. 
Explanation: Stratum intermedium - cells show unusually high activity of alkaline phosphatase, which is essential for amelogenesis. Also demonstrates high level of amino peptidase during dentinogenesis.