This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'Which vitamin deficiency cause glossitis and cheilosis? \nSelect and explain. \nA. Thiamine, B. Riboflavin, C. Folic acid, D. Vitamin A', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Deficiency of Vit B2(riboflavin)causes cheilosis and glossitis. Cheilosis: Lesions at the mucocutaneous junction at the angles of the mouth leading to painful fissures are characteristic. *Tongue: Painful glossitis, the tongue assuming a red-purple (magenta) colour. *Seborrhoeic dermatitis: Scaly, greasy, desquamationReference: Chatterjea Textbook of Biochemistry pg no: 178', 'role': 'assistant'}]