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
Duodenal aspirate is used in diagnosis of: 
Select and explain. 
A. E histolytica, B. Giardia lamblia, C. Taenia solium, D. Leishmania
B: Giardia lamblia
Answer: B: Giardia lamblia 
Explanation: Ans. b. Giardia lamblia