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
Extra-oral landmark for Gowgates technique of mandibular nerve block 
Select and explain. 
A. Corner of the mouth, B. Intertragic notch, C. Both of the above, D. None of the above
C: Both of the above
Answer: C: Both of the above 
Explanation: None