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
Highest incidence of anemia in the tropics is due to? 
Select and explain. 
A. Hookworm, B. Thread Worm, C. Ascaris, D. Guinea worm
A: Hookworm
Answer: A: Hookworm 
Explanation: Ans. is 'a' i.e., Hookworm Amongst the given options only hookworm causes anemia.