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Which type of nails are classified as deformed?

  1. Those with fungus

  2. Those with onychophagy or bitten nails

  3. Those that are overly long

  4. Those with uneven growth

The correct answer is: Those with onychophagy or bitten nails

The classification of nails as deformed is often associated with structural changes that result from certain behaviors or conditions. Nails affected by onychophagy, or bitten nails, are considered deformed because the act of biting alters their natural shape and growth pattern. This habit can lead to irregularities in nail growth and an overall unhealthy appearance. In contrast, fungus can affect the quality and appearance of nails but does not inherently change their structure in the way biting does. Overly long nails may present issues but are not classified as deformed based solely on their length. Nails with uneven growth may also have irregularities but do not fall under the category of deformation caused by a behavioral factor like onychophagy. This makes onychophagy the primary and most relevant example of deformed nails due to the direct impact of the biting habit on nail structure.