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: Physiology
Maximum IC ion concentration is seen in which GI secretion ? 
Select and explain. 
A. Saliva, B. Colonic, C. Gastric, D. Jejunal
B: Colonic
Answer: B: Colonic 
Explanation: Ans. is 'b' i.e., Colonic