Question

the largest quantities of keratin are found in the epidermal layer called the stratum
granulosum.
corneum.
lucidum.
basale.
spinosum.

Explanation:

Keratin is a fibrous structural protein. The stratum corneum, the outermost layer of the epidermis, is composed of dead, keratin - filled cells. It provides a protective barrier, and thus has the largest quantities of keratin among the epidermal layers.

Answer:

B. corneum