Answer:
Coronary thrombosis, option C
Step-by-step explanation:
Damage to the heart muscle from a blood clot in the coronary artery is known as a coronary thrombosis. The resulting heart muscle damage from such as clot is called myocardial ischemia that can then progress to become myocardial infarction (MI).
An embolus is a blood clot formation along the blood vessel lining. A thrombus is an embolus that has dislodged from the vessel wall and has began to traverse the circulatory system before eventually becoming trapped in a vessel that it cannot pass through.
Phlebitis is inflammation of a blood vessel, usually in veins, that can be the result of a blood clot.
However, because the question refers specifically to the damage the blood clot causes to the heart muscle via the coronary artery, it is known as a coronary thrombosis, option C.