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: Social & Preventive Medicine
Man in the only host for 
Select and explain. 
A. Dracunculus medinensis, B. Trichuris trichura, C. Onchocerca volvolus, D. Wuchereria bancrofti
B: Trichuris trichura
Answer: B: Trichuris trichura 
Explanation: Obligate Host: Means the only host
– Man in Measles
– Man in Typhoid