Antipyretic drugs prevent platelet coagulation, apart from reducing fever. Because of this action, antipyretic aspirin is also used:

in the prevention of heart attack

The correct answer is option 1. in the prevention of heart attack.

The statement describes the additional action of antipyretic drugs, particularly aspirin, in preventing platelet coagulation. This additional action of aspirin, which inhibits platelet aggregation, is often utilized in the prevention of heart attacks. Aspirin is commonly prescribed as a preventive measure for heart attacks because it reduces the risk of blood clot formation, which can lead to blockages in the arteries supplying blood to the heart (coronary arteries). By inhibiting platelet aggregation, aspirin helps to prevent the formation of clots that could potentially block these arteries, reducing the risk of heart attack.

Therefore, the correct option is (1) in the prevention of heart attack.