Myocardial infarction is caused by _______________.
Hardening of arteries
Lumpy thickness develop in the inner walls of arteries.
Clot may occur in the lumen of coronary artery.
Sudden interruption in blood flow towards a portion of heart.
The correct option is C Clot may occur in the lumen of coronary artery. A heart attack occurs when one of the heart's coronary arteries is blocked suddenly or has extremely slow blood flow. A heart attack also is called a myocardial infarction. The usual cause of sudden blockage in a coronary artery is the formation of a blood clot.
So, the correct answer is clot may occur in the lumen of coronary artery.