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: Medicine
Reid index, False is 
Select and explain. 
A. Normal value is <0.4, B. Reid index is increased in chronic Bronchitis., C. Measures hypertrophy of mucosal Epithelium., D. Daily sputum production can be correlated with Reid index.
C: Measures hypertrophy of mucosal Epithelium.
Answer: C: Measures hypertrophy of mucosal Epithelium. 
Explanation: Reid index measures hypertrophy of the mucus secreting glands.