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
Which of the following infestation leads to malabsorption - 
Select and explain. 
A. Giardia lamblia, B. Ascaris lumbricoides, C. Necator Americanus, D. Ancylostoma duodenale
A: Giardia lamblia
Answer: A: Giardia lamblia 
Explanation: Disease manifestations of giardiasis range from asymptomatic carriage to fulminant diarrhea and malabsorption.

Note: Ancylostoma duodenale also causes malabsorption, but only in children. On the other hand, Giardia causes malabsorption both in children as well as in adults.