This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 2 (Helminthology), Subject name: Microbiology
Operculated eggs are seen in: 
Select and explain. 
A. Nematodes, B. Cestodes, C. Trematodes, D. Protozoa
C: Trematodes
Answer: C: Trematodes 
Explanation: Operculated eggs are seen in trematodes except schictosoma non operculated eggs are seen in schistosoma