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: Pediatrics
All are causes of infantile tremor syndrome EXCEPT: 
Select and explain. 
A. Malnutrition, B. Magnesium deficiency, C. Infections, D. Vitamin B1 deficency
D: Vitamin B1 deficency
Answer: D: Vitamin B1 deficency 
Explanation: Vitamin B1 deficency REF: OP Ghai ed p. 558 Vitamin B 12 deficiency not B1 deficiency causes infantile tremor syndrome Causes of infantile tremor syndrome: Malnutrition Vitamin B12 deficiency Infections Magnesium deficiency Toxins Tyrosinase defects