Final answer:
The correct answer is d. pustule. A pustule is a type of skin lesion that evolves from a papule and contains bacterial fluid and pus.
Step-by-step explanation:
The correct answer is d. pustule.
A pustule is a type of skin lesion that evolves from a papule and contains bacterial fluid and pus. It is a pus-producing, suppurative infection of the skin. Pustules can be seen in various conditions such as acne, impetigo, and furuncles.