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
Carotid body tumours 
Select and explain. 
A. Arises from the endothelial cells, B. Originates from the Schwann cells, C. R/T is the Rx of choice, D. May metastasize
D: May metastasize
Answer: D: May metastasize 
Explanation: Carotid body tumors may metastasize in rare cases.