Final answer:
Under Medicare, the patient is required to pay a monthly premium for Plan B and Plan D.
Step-by-step explanation:
Under Medicare, the patient is required to pay a monthly premium for Plan B and Plan D.
Plan A of Medicare primarily covers hospital charges for individuals eligible for Social Security benefits and does not require a monthly premium.
Plan C of Medicare, also known as Medicare Advantage, is a private insurance alternative to traditional Medicare. It may require a monthly premium, but this can vary depending on the specific plan and insurance company.
Therefore, the correct answer is Plan B and Plan D.