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: Forensic Medicine
All of the following statements are true, except ? 
Select and explain. 
A. Medulla is thin and fragmented in human hair, B. Medullary index > 0.5 in animal hair, C. Cortex is thin in human hair, D. Animal hair is coarse and thick
C: Cortex is thin in human hair
Answer: C: Cortex is thin in human hair 
Explanation: Human hair :

Cortex is thick
Medulla is thin and fragmented 
Medullary index < 0.3