A 36-year-old female patient has a history of 52-hypovitaminosis. The most likely cause of specific symptoms (epithelial, mucosal, cutaneous, corneal lesions) is the defi- ciency of:

Answer options

1. Flavin coenzymes
2. Cytochrome oxidase
3. Cytochrome B
4. Cytochrome A1
5. Cytochrome C

Explanation

Riboflavin (vitamin B2) deficiency is mostly caused by the deficiency of riboflavin coenzymes FAD and FMN. this leads to the symptoms above.