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
Protein making up the bulk of keratohyaline granules in stratum granulosum of keratinized epithelium is 
Select and explain. 
A. Involucrin, B. Vinculin, C. Filaggrin, D. Nectin
C: Filaggrin
Answer: C: Filaggrin 
Explanation: None