This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Pathology
[{'content': "A patient presented with complains of chronic constipation and diarrhoea. There was excessive associated weight loss. Intestinal biopsy was obtained and it showed the following findings. What is your diagnosis? \nSelect and explain. \nA. Giardia, B. Entamoeba, C. Whipple's disease, D. CMV", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Giardiawww.ncbi.nihgov/pubmed/104699(Ref: )This image shows Giardia lamblia infection of the small intestine. The small pear-shaped trophozoites live in the duodenum and become infective cysts that are excreted. They produce a watery diarrhea. A useful test for diagnosis of infectious diarrheas is stool examination for ova and parasites.', 'role': 'assistant'}]