All of the following statements are true, except ?: (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
Answer is C. Human hair :

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