Verruca is a viral infection on the top layer of the skin, can be contagious and can spread all over the body, plantar warts.

• A. Verruca
• B. Acne
• C. Steatoma
• D. Lukoderma

Answer: (A)

Verruca is caused by human papillomavirus infecting the epidermis, the top layer of the skin. Because HPV spreads by skin-to-skin contact and through contaminated surfaces, verrucae are contagious and can spread to other areas of the body through autoinoculation. Plantar warts are a type of verruca that form on the soles of the feet, where the virus infects the thick skin there.

The other terms describe different skin conditions: acne involves clogged pores and bacteria, a steatoma is a sebaceous cyst, and lukoderma refers to loss of pigment.