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: ENT
Middle age diabetic with tooth extraction with ipsilateral swelling over middle one-third of sternocleidomastoid & displacement of tonsils towards contralateral - 
Select and explain. 
A. Parapharyngeal abscess, B. Retropharyngeal abscess, C. Ludwigs angina, D. None
A: Parapharyngeal abscess
Answer: A: Parapharyngeal abscess 
Explanation: None