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: Social & Preventive Medicine
[{'content': 'Pellagra is caused bv deficiencv of which vitamin - \nSelect and explain. \nA. B2, B. B3, C. B1, D. Folic acid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., B3 The Vitamins VitaminDeficiency DiseaseLipid-soluble A Retinol, b-caroteneNight blindness, xerophtalmia; keratinization of skinD CalciferolRickets = poor mineralizetion of bone; osteomalacia = bone demineralizatinE Tocopherols, tocotrienolsExtremely rare--serious neurologic dysfunctionK Phylloqinone: menaquinonesImpaired blood clotting, hermorrhagic diseaseWater-solube B1 ThiaminPeripheral nerve damage (beriberi) or central nervous system lesions (Wemicke-Korsakoff syndrome)B2 RiboflavinLesions of comer of mouth, lips and tongue, seborrheic dermatitisNiacin Nicotinic acid nicotinamidePellagra--photosensitive dermatitis depressive psychosisB6 Pyridoxine, pyridoxal, pyridoxamineDisorder of amino acid metabolism, convulsionsFolic acidMegaloblastic anemiaBl2 CobalaminPernicious anemia = megaloblastic anemia with degeneration of the spinal cordPantothenic acidPeripharal nerve damage (nutritional melagia or "burning foot syndrome")H BiotinImpaired and carbohydrate metabolism dermatitisC Ascorbic acidScurvy--impaired wound healing, loss of dental cement, subcutaneous hemorrhage', 'role': 'assistant'}]