This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Solitary hypoechoic lesion of the liver without septae or debris is most likely to be: 
Select and explain. 
A. Hydatid cyst, B. Caroli's disease, C. Liver abscess, D. Simple cyst
D: Simple cyst
Answer: D: Simple cyst 
Explanation: Ans. Simple cyst