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Which condition results from a split or brittle nail?

  1. Pterygium

  2. Onychorrhexis

  3. Paronychia

  4. Onycholysis

The correct answer is: Onychorrhexis

Onychorrhexis is a condition characterized by long, brittle, and split nails. Pterygium is a growth of tissue over the white part of the eye, and Paronychia is a bacterial or fungal infection of the skin around the nail. Onycholysis is the separation of the nail from the nail bed. None of these conditions specifically result from a split or brittle nail, making Onychorrhexis the most accurate answer.