Final answer:
Apocrine sweat glands are correctly paired with the secretion that has an odor with a possible pheromone function in humans.
Step-by-step explanation:
The correct pairing of a gland and its secretion is:
a. Apocrine sweat glands - secretes sweat that, when released, has an odor with a possible pheromone function in humans.
Eccrine glands, on the other hand, secrete a watery sweat that helps regulate body temperature. Ceruminous glands produce cerumen, or earwax, which helps moisturize the ear canal.
Sebaceous glands produce sebum, an oily substance that moisturizes the hair and skin.