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: Microbiology
Hydatid cyst is: 
Select and explain. 
A. Parasitic in nature, B. Fungal, C. Congenital, D. Viral
A: Parasitic in nature
Answer: A: Parasitic in nature 
Explanation: None