**Core Concept**
Acne vulgaris is a chronic inflammatory skin condition characterized by comedones (blackheads and whiteheads), papules, pustules, and sometimes nodules and cysts. The underlying pathophysiology involves the interaction of sebum production, keratinization, and bacterial colonization of Propionibacterium acnes (P. acnes).

**Why the Correct Answer is Right**
Treatment options for acne vulgaris aim to reduce sebum production, prevent comedone formation, and decrease bacterial growth. Topical retinoids, such as adapalene and tretinoin, work by promoting cell turnover and preventing keratinization. Systemic antibiotics, like doxycycline, target P. acnes by inhibiting protein synthesis. Hormonal treatments, including birth control pills and spironolactone, are effective in cases of acne associated with hormonal fluctuations. Isotretinoin, a systemic retinoid, is used for severe, resistant cases.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a recognized treatment for acne vulgaris. **Option B:** This is incorrect as it's a treatment for fungal infections. **Option C:** This is not a standard treatment for acne vulgaris; it may be used for other skin conditions.

**Clinical Pearl / High-Yield Fact**
When prescribing isotretinoin, it is essential to counsel patients about the risk of teratogenicity and the importance of two forms of birth control to prevent pregnancy during treatment.

**Correct Answer: C. Systemic antibiotics, topical retinoids, and hormonal treatments.**