This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology, Subject name: Microbiology
The slender rhabditiform larvae of which of the following helminths move about in water and are ingested by species of cyclops? 
Select and explain. 
A. D. Latum, B. D. Medinensis, C. W. Bancrofti, D. S. Mansoni
B: D. Medinensis
Answer: B: D. Medinensis 
Explanation: Ans. is 'b' i.e., D. Medinensis(Ref: Harrison, 19th/e, p. 1422-1423; Chatterjee, 12th/e, p. 204)* Larva of D. Medinensis is ingested by Cyclops in the water.