This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2017, Subject name: Medicine
Which of the following is true about carcinoid tumor? 
Select and explain. 
A. Occurs along structures derived from foregut, B. Presentation is hypeension and diaphoresis, C. Intestinal carcinoids are of high malignant potential, D. Best diagnosed by elevated urinary vanillymandelic acid levels
A: Occurs along structures derived from foregut
Answer: A: Occurs along structures derived from foregut 
Explanation: Mc site for Carcinoid tumor = GI tract>Lungs (Bronchus) Option B = Presentation is hypeension & diaphoresis (it is not True because presentation of Carcinoid tumor is usually secretory diarrhea) Option D = Best Dx by elevated urinary Vanillylmandelic Acid levels. (No, it is done for Neuroblastomas)