<prompt> A 12-year-old boy presents with hematemesis, melena and mild splenomegaly. There is no obvious jaundice or ascites. The most likely diagnosis is:Extrahepatic poal venous obstructionNon-cirrhotic poal fibrosisCirrhosisHepatic venous outflow tract obstruction  <response>: Most likely diagnosis is Extrahepatic Poal Vein Obstruction Differences bw EHPVO and NCPF EHPVO - Extra hepatic poal venous obstruction- usually seen in 1st to 2nd decade; splenomegaly is less common if its present, It is only mildmoderate NCPF - Non-Cirrhotic poal fibrosis - in 2nd -4th decade; Splenomegaly is MC If present, it is moderate to severe ;hematemesis present , no obvious jaundice ascites . 