This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Pellagra 
Select and explain. 
A. Is due to pyridoxine deficiency, B. Occurs with diet chiefly on maize, C. Night blindness is a presenting feature, D. Causes high output cardiac failure
B: Occurs with diet chiefly on maize
Answer: B: Occurs with diet chiefly on maize 
Explanation: • RDA is often higher than the recommended minimum requirement: RDA includes both daily requirement and some additional requirement for periods of growth or illness.