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: Medicine
In giardiasis malabsorption is due to all except 
Select and explain. 
A. Loss of brush border enzymes, B. Bacterial overgrowth, C. Lactose intolerance, D. Hypogammaglobulinaemia
A: Loss of brush border enzymes
Answer: A: Loss of brush border enzymes 
Explanation: Answer- A. Loss of brush border enzymesGiardia causes diarrhea and malabsorption. Malabsoion is due to loss of brush border enzyme activities, which cause fat malabsorption (steatonhea) and vitamin deficiency.There may be abdominal pain, bloating, nausea & vomiting flatulence and flatts.