Ans. is 'd' i.e., Poal hypeension due to extrahepatic obstruction Splenomegaly and esophageal varices point to the diagnosis of poal hypeension while absence of jaundice and deranged liver function test indicate an extrahepatic etiology. Differentiation between Extrahepatic and Hepatic / Post hepatic poal hypeension o Post sinusoidal and hepatic causes of poal hypeension will have evidence of Liver parenchymal damage / deranged LFT (jaundice) a dilated poal vein on ultrasonography o Extrahepatic presinusoidal obstruction will not have any effect on the Liver and hence there will be no evidence of hepatocellular damage. No jaundice / No raised deranged LFT Also non visualization of poal vein is a characteristic of poal vein thrombosis, an Extrahepatic cause. o Esophageal varices and splenomegaly are a manifestation of poal hypeension and will be present in all the above sites of obstruction.