Question

painful cracks at the corners of the mouth and a swollen, red tongue are signs of a deficiency of

multiple choice

thiamin

riboflavin

vitamin c

vitamin b - 6

Explanation:

Riboflavin (vitamin B - 2) deficiency can cause cheilosis (painful cracks at the corners of the mouth) and glossitis (swollen, red tongue). Thiamin (vitamin B - 1) deficiency causes beriberi. Vitamin C deficiency causes scurvy. Vitamin B - 6 deficiency can cause skin disorders, but the classic signs in the question are more characteristic of riboflavin deficiency.

Answer:

riboflavin