This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
Abdominal pain, fat malabsorption and frothy stools suggests of 
Select and explain. 
A. Amoebiasis, B. Bacillary dysentry, C. Giardiasis, D. Pancreatic enzyme deficiency
C: Giardiasis
Answer: C: Giardiasis 
Explanation: Giardia lamblia is an intestinal flagellate , infection acquired by ingestion of contaminated water and food and also by ano- oral sexual practice The parasite attaches itself to the epithelial surface of duodenum and jejunum causes a disturbance of intestinal function , leading to malabsorption of fat .patient complaints of loose stool and steatorroea. Baveja textbook of parasitology , 3rd edition.