<prompt> Most commonly involved organ in congenital tuberculosis isLungsLiverLymph nodesSkin  <response>: Ans. Answer is B Liver: Most common primary site- LIVER primary complex in liver is suggestive of congenital TB Most common site is- LUNG The form of disease is usually miliary with multiple organ involvement. Lungs are involved in almost all cases. Other sites frequently involved are liver, spleen, lymph nodes, the gastrointestinal tract and kidney. -Textbook of Pulmonary Medicine by Behera 2a495 