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
A 10-year-old boy presents with torticollis, a tender swelling behind the angle of mandible and fever. He had history of ear discharge for the past 6 years. Examination of the ear showed purulent discharge and granulations in the ear canal. Most probable diagnosis is: 
Select and explain. 
A. Acute lymphadenitis secondary to otitis externa, B. Masked mastoiditis, C. Bezold abscess, D. Parotitis
C: Bezold abscess
Answer: C: Bezold abscess 
Explanation: Purulent ear discharge, granulations in the ear canal, tender swelling between the angle of mandible and mastoid indicates Bezold abscess. Torticollis is due to spasm of sternocleidomastoid muscle. In Bezold abscess, pus bursts through the medial side of the tip of mastoid. There is no ear discharge or granulations in masked mastoiditis.In parotitis there is associated swelling over the parotid area.