This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
Niacin deficiency occurs in all except- 
Select and explain. 
A. Prolonged antibiotic use, B. Hanup's disease, C. Carcinoid syndrome, D. Isoniazid use
D: Isoniazid use
Answer: D: Isoniazid use 
Explanation: isoniazid act as chemical antagonist to pyridoxine causing pyridoxine deficiency Ref Harrison 20th edition pg 78