Which ingredient would be helpful for treating acne-prone skin?

Salicylic acid is highly effective for treating acne-prone skin because it is a beta-hydroxy acid (BHA) that penetrates deep into the pores, helping to exfoliate dead skin cells, reduce excessive oil buildup, and prevent clogged pores. Additionally, salicylic acid has anti-inflammatory properties, which can help soothe existing breakouts and reduce redness. Its ability to dissolve the type of skin debris that clogs pores makes it a go-to ingredient in many acne treatment products, contributing to clearer skin over time.

In contrast, the other options may not be suitable for acne treatment. Petroleum jelly, for instance, is occlusive and can trap dirt and bacteria in the pores, potentially leading to further breakouts. Hydroquinone is primarily a skin-lightening agent used to treat hyperpigmentation and is not designed to address the underlying causes of acne. Coconut oil, while moisturizing, is comedogenic for many skin types, which means it can clog pores and worsen acne in those who are prone to it.