**Question:** Acne Vulgaris is due to involvement of:

A. Sebaceous Glands
B. Hair Follicles
C. Sebaceous Glands and Hair Follicles
D. Sebaceous Glands and Epidermis

**Core Concept:**
Acne Vulgaris is a common skin condition characterized by the presence of comedones (open or closed pores), papules, pustules, and nodules due to the dysfunction of sebaceous glands and hair follicles. Sebaceous glands secrete sebum (oil), which is essential in maintaining skin hydration and preventing bacterial colonization. Hair follicles are the tiny openings through which hairs grow from the skin.

**Why the Correct Answer is Right:**
Acne Vulgaris is primarily caused by the dysfunction of sebaceous glands (Option C) and hair follicles (Option B) due to the following reasons:

1. Sebaceous glands: Oversupply of sebum, irregular sebum composition, and the presence of comedones (open or closed pores) contribute to the development of acne lesions.
2. Hair follicles: Blockage of hair follicles by dead skin cells, sebum, and bacteria (Propionibacterium acnes) leads to the formation of comedones, which further exacerbates the problem.

**Why Each Wrong Option is Incorrect:**
A. Sebaceous glands (Option A) alone is not sufficient to explain the entire acne process, as hair follicles and their interaction with sebum and bacteria also play a crucial role.
C. While sebaceous glands and hair follicles are involved in acne pathogenesis, the correct answer should include both to accurately represent the condition.
E. Sebaceous glands and epidermis (Option D) are not directly related to the pathogenesis of acne vulgaris. The epidermis is the outer layer of the skin, while acne is a condition involving sebaceous glands and hair follicles.

**Clinical Pearls:**
Acne Vulgaris is primarily a skin disorder affecting the pilosebaceous units (sebaceous glands and hair follicles) due to the interplay of factors such as hormonal changes, genetics, and environmental influences. Understanding the role of sebaceous glands and hair follicles is essential for accurate diagnosis and treatment of acne lesions.