Final answer:
A benign liver adenoma is most frequently associated with oral contraceptive use, contrasting with hepatocellular carcinoma which is a primary liver cancer with different risk factors.
Step-by-step explanation:
The benign tumor of the liver most frequently associated with oral contraceptives is choice B. Adenoma. Liver adenomas are benign tumors that are linked to the usage of estrogen-containing oral contraceptives. They are relatively uncommon but can have significant complications if they rupture or bleed. Unlike Hepatocellular carcinoma, which is a malignant liver tumor, liver adenomas do not typically have the potential to spread to other parts of the body (metastasize). In contrast, hemangioma and focal nodular hyperplasia are other types of benign liver lesions that are not specifically linked to contraceptive use. Hepatocellular carcinoma is the most common type of primary liver cancer and has different risk factors like chronic hepatitis infection and cirrhosis.