This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
Acne vulgaris invloves- 
Select and explain. 
A. Pilosebaceous gland, B. Sebaceous gland, C. Eccrine gland, D. Apocrine gland
A: Pilosebaceous gland
Answer: A: Pilosebaceous gland 
Explanation: Acne vulgaris is s disorder of pilosebaceous gland which predominantly affects the peripubeal population and clinically manifest as comedones, papules, nodules, pustules,and cysts and heals with scar. Ref Harrison20th edition pg 1234