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
You have injected local anaesthesia for a patient for extraction of lower molar using classical inferior alveolar nerve block. Which space has the highest chance of infection with this block? 
Select and explain. 
A. Lateral pharyngeal space, B. Pterygomandibular space, C. Para pharyngeal space, D. Pretracheal space
B: Pterygomandibular space
Answer: B: Pterygomandibular space 
Explanation: None