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
The trismus following a lower molar extraction after 4 weeks may be due to: 
Select and explain. 
A. Breakage of needle in pterygomandibular space, B. Hematoma of TMJ, C. Submassetric space abscess, D. Root stump in the socket
A: Breakage of needle in pterygomandibular space
Answer: A: Breakage of needle in pterygomandibular space 
Explanation: None