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The hypertrophy known as verruca is caused by ________.

  1. Virus

  2. Bacteria

  3. Fungus

  4. Inflammation

The correct answer is: Virus

Verruca is a type of hypertrophy that is caused by a virus. It is also commonly known as a wart. This makes options B, C, and D incorrect because these are typically caused by bacteria, fungus, and inflammation, respectively. Inflammation can sometimes be a contributing factor to the growth of verruca, but it is not the direct cause.