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Which medication increases the amount of blood and oxygen to the heart by dilating the coronary arteries?

  1. Diuretics

  2. Anti-hypertensives

  3. Cardiac glycosides

  4. Anti-anginals

The correct answer is: Anti-anginals

Anti-anginals are medications that work by dilating the coronary arteries, which increases the blood and oxygen supply to the heart. This helps in relieving chest pain or angina by improving blood flow to the heart muscle. Diuretics, anti-hypertensives, and cardiac glycosides do not have the same mechanism of action as anti-anginals in dilating coronary arteries to increase blood and oxygen supply to the heart.