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: Ophthalmology
Metabolically active layer of cornea is –a) Endotheliumb) Stromac) Descemet membrane d) Epithelium 
Select and explain. 
A. b, B. c, C. ad, D. ab
C: ad
Answer: C: ad 
Explanation: The most actively metabolizing layers of the cornea are epithelium and endothelium.