This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
Diarrhoea with acantholysis in urine 
Select and explain. 
A. Whipples disease, B. Celiac sprue, C. Abetalipoproteinemia, D. Ulcerative colitis
C: Abetalipoproteinemia
Answer: C: Abetalipoproteinemia 
Explanation: Harrison's principles of internal medicine 17th edition. *Steatorrheal cause of chronic diarrhea is a mucosal malabsorption caused by celiac disease,whipple's disease and abetalipoproteinemia. Abetalipoproteinemia is a rare defect is a defect of chylomicron formation and fat malabsorption in children associated with acantholytic erythrocytes,,ataxia and retinitis pigmentosa.