**Core Concept**
Pleomorphic adenoma, also known as benign mixed tumor, is a common type of salivary gland tumor that exhibits a wide range of histological features. It is a benign neoplasm that arises from the epithelial and connective tissue components of the salivary glands, with the majority occurring in the parotid gland.

**Why the Correct Answer is Right**
The parotid gland is indeed the most commonly involved salivary gland in cases of pleomorphic adenoma, accounting for approximately 60-70% of all cases. This is due to its larger size and higher cell turnover rate compared to other salivary glands. The parotid gland's superficial location also makes it easier to detect and diagnose pleomorphic adenomas. The high prevalence of pleomorphic adenomas in the parotid gland highlights the importance of regular head and neck examinations in identifying and treating this condition early.

**Why Each Wrong Option is Incorrect**
**Option B:** This statement is incorrect because malignant transformation of pleomorphic adenoma does occur, albeit rarely. This can lead to the development of malignant mixed tumors, also known as carcinoma ex pleomorphic adenoma, which requires prompt treatment.

**Option C:** This statement is incorrect because pleomorphic adenoma is not also called adenolymphoma. Adenolymphoma, also known as Warthin's tumor, is a distinct type of salivary gland tumor that is characterized by its lymphoid stroma and typically occurs in the parotid gland.

**Option D:** This statement is incorrect because pleomorphic adenomas are more commonly found in women than men, with a female-to-male ratio of approximately 2:1. This highlights the importance of considering gender-specific factors in the diagnosis and management of salivary gland tumors.

**Clinical Pearl / High-Yield Fact**
A key clinical pearl to remember is that pleomorphic adenomas can present with a wide range of symptoms, from asymptomatic to painful and swollen masses. Early detection and treatment are crucial in preventing malignant transformation and improving patient outcomes.

**✓ Correct Answer: A. Parotid gland is most commonly involved**