This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
A middle aged female presents with chronic pain in right side of abdomen with intermittent fever. Clinical examination revealed mild hepatomegaly and hence a contrast enhanced CT abdomen was performed. Based on the imaging characteristics of this focal lesion the most likely diagnosis is ? 
Select and explain. 
A. Liver abscess, B. Hydatid cyst, C. Pseudocyst of pancreas, D. Hepatocellular carcinoma
B: Hydatid cyst
Answer: B: Hydatid cyst 
Explanation: The Poal phase CT demonstrates a large cystic structure with a discrete wall, separated internal membranes and several 'daughter cysts'. It is characteristic of Hydatid cyst