A 60-Year-Old Chronic Smoker and Alcoholic Man

A 60-year-old chronic smoker and alcoholic man
Suffering from odynophagia, insomnia, epigastric
Discomfort, and recurrent diarrhea presented to
The outpatient department. Clinical examination
Revealed memory disorientation, stomatitis, glossitis, esophagitis, and exfoliative dermatitis with some
Vesicles on erythematous bases on photoexposed
Sites such as his hands shown in the attached image.
These signs and symptoms are most likely the result
Of a deficiency in which of the following vitamins?

A) biotin
B) cobalamin
C) niacin
D) riboflavin
E) thiamin