**Core Concept**
The boy's presentation of torticollis, a tender swelling behind the angle of mandible, and fever in conjunction with a long history of ear discharge and granulations in the ear canal suggests a complication of chronic otitis media, likely involving a cholesteatoma.

**Why the Correct Answer is Right**
The presence of granulations in the ear canal is a key finding, as it indicates the presence of a cholesteatoma, which is a type of skin cyst that can erode into adjacent structures, including the bone, leading to complications such as torticollis due to involvement of the sternocleidomastoid muscle. The chronic ear discharge and granulations are indicative of a chronic otitis media with cholesteatoma. The sternocleidomastoid tumor, a mass in the neck, is a known complication of cholesteatoma.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it is more related to acute mastoiditis, which typically presents with severe pain, fever, and mastoid tenderness, but does not usually have a long history of ear discharge.

**Option B:** This option is incorrect as it is more related to an external auditory canal foreign body, which would not explain the long history of ear discharge or the presence of granulations.

**Option C:** This option is incorrect as it is more related to a parotid gland infection or abscess, which would not explain the presence of granulations in the ear canal.

**Clinical Pearl / High-Yield Fact**
A cholesteatoma can erode into the carotid artery, leading to a potentially life-threatening hemorrhage, making early diagnosis and treatment crucial.

**Correct Answer:** . Cholesteatoma.