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
Excess of leucine causes: 
Select and explain. 
A. Pellagra, B. Constipation, C. Hypervitarninosis, D. Progeria
A: Pellagra
Answer: A: Pellagra 
Explanation: Pellagra