This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Mastoid tip is involved in \nSelect and explain. \nA. Bezold abscess, B. Luc abscess, C. Citelli abscess, D. Parapharyngeal abscess', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bezold abscess can occur following acute coalescent mastoiditis when pus breaks through the thin medial side of the tip of the mastoid and present as a swelling in the upper pa of the neck. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 87)', 'role': 'assistant'}]