This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, 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'.