Please choose the correct ending to complete the given sentence: Health: [header] How to treat scalp pimples [title] Use benzoyl peroxide. [step] Benzoyl peroxide is a common ingredient in acne washes and lotions. It works by killing bacteria that may otherwise clog pores to form new pimples.

Ending1: It can be found at many pharmacies. [substeps] It's an attractive, creamy product that also combines with other lotions. Ending2: It also helps clear away excess oil and dead skin cells from the affected area. Benzoyl peroxide is usually found in strengths varying between 2.5 percent to 10 percent in over-the-counter products. Ending3: [substeps] As a way to get rid of scalp pimples, apply this treatment at least twice a day. A full day will provide less relief than a day without the benzoyl peroxide treatment. Ending4: Benzoyl peroxide is available over-the-counter by prescription, and will stop the production of acne bacteria-possibly for a period of time. [substeps] The goal of using benzoyl peroxide is to get rid of unwanted bacteria in your scalp, so do not take it on a regular basis.

Answer format: ending1/ending2/ending3/ending4