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
True about diphyllobothrium: 
Select and explain. 
A. Man is single host, B. Iron deficiency anemia is seen, C. Operculated egg is diagnostic, D. Fish is the definitive host
C: Operculated egg is diagnostic
Answer: C: Operculated egg is diagnostic 
Explanation: Ans. c. Operculated egg is diagnostic