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: Pathology
The earliest response of pulpitis is: 
Select and explain. 
A. Cyst formation, B. Calcification, C. Hyalinization, D. Formation of dental granuloma
C: Hyalinization
Answer: C: Hyalinization 
Explanation: None