Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to remove flat warts [title] Use over-the counter or prescription wart treatments. [step] These over-the-counter medications include salicylic acid ointments, glycolic acid, and tretinoin ointments. These medications work to peel away at the warts and reduce their size.

Ending1: [substeps] These ointments should be applied every morning to be effective. However, talk to your doctor before using these medications, as he or she may have a prescription medication that is more effective. Ending2: [title] Remove warts with a chemical peel using salicylic acid. [step] This is quite effective for removing a wart, but can cause serious stinging and scarring. Ending3: [substeps] These medications are based on the seed in the wart and have been known to be effective for centuries. Some varieties of warts are treated in pill form, while others can be removed with surgery. Ending4: They typically are not effective at removing flat patches. [substeps] Read the labels on these treatments to check whether or not they are safe for you to use.

Answer format: ending1/ending2/ending3/ending4