Which of the following medications is commonly used to relieve angina pain?

Glyceryl Trinitrate (GTN) is commonly used to relieve angina pain because it acts as a vasodilator, leading to the relaxation of the smooth muscles in the blood vessels. This allows for increased blood flow to the heart muscle, thereby reducing the pain associated with angina, which typically occurs due to inadequate blood flow. GTN can be administered sublingually, allowing for rapid absorption and onset of action, which is particularly beneficial during acute angina attacks.

Other medications listed, such as statins, have different primary uses, such as managing cholesterol levels rather than directly relieving pain. Beta blockers and calcium channel blockers can be effective in angina management but primarily work to reduce the heart's workload and oxygen demand over time, rather than providing immediate relief of pain.