This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2017, Subject name: Microbiology
All of the following have operculated eggs except: 
Select and explain. 
A. Clonorchis sinensi, B. Diphyllobothrium latum, C. Hymenolepis dimunita, D. Fasciola hepatics
C: Hymenolepis dimunita
Answer: C: Hymenolepis dimunita 
Explanation: Operculated eggs are those eggs which have a lid or operculum.Operculated eggs are present in-1. Most of the Trematodes (except Schistosomes)2. Diphyllobothrium latum (Fish tapeworm)Diphyllobothrium latum causes Megaloblastic anemia.Eggs of H. dimunita (Rat tapeworm) lacks polar filaments. Clonorchis sinensi (Oriental Liver fluke) causes Cholangiocarcinoma.