**Core Concept**
Warthin's tumor, also known as Warthin's tumor of the parotid gland, is a benign salivary gland tumor. It is characterized by its unique histological appearance and is predominantly found in the parotid gland.

**Why the Correct Answer is Right**
Warthin's tumor is a type of pleomorphic adenoma, but it is specifically associated with the parotid gland. The tumor is composed of oncocytic epithelial cells and lymphoid stroma. The oncocytic cells are large and have abundant cytoplasm, whereas the lymphoid stroma is composed of lymphocytes and plasma cells. The exact mechanism of Warthin's tumor formation is not well understood, but it is believed to be related to the activation of the c-KIT receptor tyrosine kinase.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a tumor exclusively seen in the parotid gland. While pleomorphic adenoma can occur in the parotid gland, it is not exclusive to this location.
**Option B:** This option is incorrect because it is not a tumor that is specifically associated with the parotid gland. While Warthin's tumor can occur in other salivary glands, it is predominantly found in the parotid gland.
**Option C:** This option is incorrect because it is not a tumor that is exclusively seen in the parotid gland. While basal cell adenoma can occur in the parotid gland, it is not exclusive to this location.

**Clinical Pearl / High-Yield Fact**
Remember that Warthin's tumor is a benign tumor that is predominantly found in the parotid gland and is characterized by its unique histological appearance. It is essential to consider this tumor in the differential diagnosis of parotid gland masses.

**Correct Answer: B. Warthin's tumor**