<prompt> Which vitamin deficiency cause glossitis and cheilosis?ThiamineRiboflavinFolic acidVitamin A  <response>: Deficiency of Vit B2riboflavincauses 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 