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
Abdominal pain, fat malabsorption & frothy stools suggests - 
Select and explain. 
A. Amoebiasis, B. Bacillary dysentry, C. Giardiasis, D. All
C: Giardiasis
Answer: C: Giardiasis 
Explanation: Ans. is 'c' i.e., Giardiasis . Abdominal pain, fat malabsorption and frothy stool can occur both in giardiasis and pancreatic enzyme deficiency (chronic pancreatitis). Amoebiasis and bacillary dysentry do not cause malabsorption.