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: Surgery
Functional GI disorders can be differentiated from organic GI disorders by- 
Select and explain. 
A. Abdominal pain, B. Diarrhoea, C. Tenesmus, D. Bleeding PR
D: Bleeding PR
Answer: D: Bleeding PR 
Explanation: None