This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Microbiology
Smallest cestode among the following; 
Select and explain. 
A. H. nana, B. Schistosoma, C. T. saginata, D. T. Solium
A: H. nana
Answer: A: H. nana 
Explanation: Cestodesare Long, Segmented, dorso-ventrally flattened tape-like worms There are 3 regions in an adult worm: - Head: Scolex - Neck - Strobila: consist of a series of segment called proglottids Adult worms are found in thehuman intestines Smallest cestode:Hymenolepis nana Longest cestode:Diphyllobothrium latum