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
The most common genetic cause of liver disease in children is - 
Select and explain. 
A. Haemochromatosis, B. a1 antitrypsin deficiency, C. Cystic fibrosis, D. Glyocgen storage disease
B: a1 antitrypsin deficiency
Answer: B: a1 antitrypsin deficiency 
Explanation: Ans. is 'b' i.e., a1-antitripsin deficiency o Amongst the given options ai antitrypsin deficiency is the best answer because neonatal hepatitis and extrahepatic biliary atresia are not there.