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: Anatomy
The parotid duct can be palpated when - 
Select and explain. 
A. Angle of the mandible is depressed, B. Anterior margin of the masseter is tensed, C. Posterior margin of the masseter is relaxed, D. Through the buccal mucosa
B: Anterior margin of the masseter is tensed
Answer: B: Anterior margin of the masseter is tensed 
Explanation: Parotid duct can be palpated at tense anterior margin of masseter muscle.