Final answer:
PCT erosions can leave behind various changes on the skin when they heal, except for hypopigmented atrophic scars.
Step-by-step explanation:
The correct answer is d) hypopigmented atrophic scars. When PCT erosions heal, they can leave behind several changes on the skin. Melanocytes, the cells responsible for producing melanin (the pigment that gives color to the skin), may increase their production, resulting in hyperpigmentation. The healing process may also involve an increased production of connective tissue, leading to elevated moles. Additionally, an increase in Pacinian corpuscles around the wound may occur, but this does not lead to the formation of hypopigmented atrophic scars.