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
All are seen in carcinoid syndrome except 
Select and explain. 
A. Diarrhoea, B. Constipation, C. Liver metastasis, D. 5-HT secretion
B: Constipation
Answer: B: Constipation 
Explanation: Ans. is 'b' i.e., Constipation