Which of the Following is Not a Major Component of a Hair

Question

Which of the following is not a major component of a hair shaft?
A) Cuticle
B) Cortex
C) External root sheath
D) Medulla
E) Keratin

Accepted Answer

The external root sheath is part of the hair follicle, not the hair shaft. The hair shaft itself is primarily composed of the cuticle, cortex, and sometimes the medulla, along with keratin as a key structural protein.