This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
In hydatid cyst which layer has germinal membrane and contains ble parasites 
Select and explain. 
A. Pericyst, B. Mesocyst, C. Ectocyst, D. Endocyst
D: Endocyst
Answer: D: Endocyst 
Explanation: The hydatid cyst is characterised by three layers, an outer pericyst derived from compressed host organ tissues, an intermediate hyaline ectocyst, which is non-infective, and an inner endocyst that is the germinal membrane and contains ble parasites which can separate forming daughter cysts.Ref: Bailey and Love 27e pg: 64