Final Answer:
The three main layers of the hair shaft are Medulla, Cortex, and Cuticle. So the correct option is b) Medulla, Cortex, Cuticle
Step-by-step explanation:
The innermost layer of the hair shaft, the medulla, is a soft, spongy tissue often present in thick hairs but may be absent in fine hairs. It plays a role in the overall structure of the hair.
Surrounding the medulla, the cortex constitutes the bulk of the hair shaft. It contains pigment granules that give hair its color and contributes to its strength, elasticity, and texture.
The outermost layer is the cuticle, a protective, transparent layer consisting of overlapping scales. The cuticle helps prevent damage to the inner layers and influences the texture of the hair. It is also responsible for the shine of the hair.