Multiple choice

Deficiency of which vitamin causes the cracking of lips at the corner?

  1. Vitamin A

  2. Vitamin B2

  3. Vitamin C

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Angular cheilitis (cracking at mouth corners) is a classic sign of riboflavin (Vitamin B2) deficiency. This B vitamin is essential for skin and mucous membrane health. Other B vitamin deficiencies cause different symptoms: B1 (beriberi), B3 (pellagra), and B12 (anemia).