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: Pathology
Which of the following Orofacial pain is not associated with vascular origin? 
Select and explain. 
A. Cluster headache, B. Giant cell arteritis, C. Anaesthesia dolorosa, D. Chronic paroxysmal hemicrania
C: Anaesthesia dolorosa
Answer: C: Anaesthesia dolorosa 
Explanation: None