Final answer:
Alopecia is the technical term for hair loss and is the correct option, which describes the abnormal condition associated with hair loss in dermatology and trichology.
Step-by-step explanation:
Alopecia is the technical term for C) Hair loss. This term is used in the field of dermatology and trichology to describe any abnormal condition associated with the loss of hair. The condition can manifest in various forms, ranging from mild thinning to complete baldness.
Alopecia is not related to skin pigmentation disorder like albinism, which is a genetic disorder that affects skin, hair, and eyes due to the inability of melanocytes to produce melanin. Nor is it associated with acne, a skin condition due to infected sebaceous glands, or sebum production itself. Lastly, alopecia does not refer to any abnormalities in nail growth.