This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Secretory Functions of the Alimentary Tract, Subject name: Physiology
Total fluid secreted by salivary gland, stomach, pancrease and itestine in a day - 
Select and explain. 
A. 2000ml, B. 4000ml, C. 6500 ml, D. 10000 ml
C: 6500 ml
Answer: C: 6500 ml 
Explanation: Ans. is 'c' i.e., 6500 ml Daily water turnover (mL) in the gastrointestinal tractIngested 2000Endogenous secretions 7000Salivary glands1500 Stomach2500 Bile500 Pancreas1500 Intestine+ 1000 7000 Total input 9000Reabsorbed 8800Jejunum5500 Ileum2000 Colon+ 1300 8800 Balance in stool 200