The correct answer is: A. Dermatology
Dermatology is the medical specialty concerned with the skin, its appendages (hair, nails, and sweat glands), and the mucosa. A dermatologist diagnoses and treats diseases, disorders, and cosmetic problems of the skin, hair, and nails.
Endocrinology is the medical specialty concerned with the endocrine system, its diseases, and its disorders. The endocrine system is a collection of glands that produce hormones that regulate many important body functions, such as growth, metabolism, and reproduction.
Gynecology is the medical specialty concerned with the female reproductive system. A gynecologist diagnoses and treats diseases, disorders, and conditions
of the female reproductive system, including the uterus, ovaries, fallopian tubes, and vagina.Orthopedics is the medical specialty concerned with the musculoskeletal system, its diseases, and its disorders. The musculoskeletal system is made up of bones, muscles, tendons, ligaments, and joints.