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
Most common organ involved in congenital Tb is? 
Select and explain. 
A. Liver, B. Pancreas, C. Kidney, D. Lung
A: Liver
Answer: A: Liver 
Explanation: Ans. is 'a' i.e., Liver Congenital tuberculosis Although it is rare as mother having tuberculosis primarily present with infeility. Tuberculous bacilli sometimes pass throgh umblical vein and may develop focus in liver (hepatic complex). When neonate aspirate amniotic fluid containing bacilli then develop GI tuberculosis or lung infection. Neonate usually present as respiratory distress, hepatosplenomegaly lymphadenopathy. Overall liver is most commonly involved in congenital tuberculosis