This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Vitamin B12 and bile salts are decreases in the resection of 
Select and explain. 
A. Stomach, B. Duodenum, C. Jejunum, D. Ileum
D: Ileum
Answer: D: Ileum 
Explanation: i.e. (Ileum): (1157-Love & Baily 25th) (625-26-CSDT-l31) JEJUNUMILEUMNormalGeneralized transport of water, electrolytes, sugars proteins, fats, vitamins Most absorption occurs proximallyLocalized transport of bilesalts, cholesterol, vitamin BResection* Generalized transport work load assumed by ileum* Localized transport unaffected* No malabsorption* Generalized transport continues* Localized transport lost* Malabsorption of vitamin B 12, cholesterol bile salts andfats***Steatorrhea, diarrhea, megaloblastic anemia and malnutrion are the hall marks of Blind loop syndrome