Question

what is the major cause of cad?
atherosclerosis
artheronecrosis
arteriasclerosis
artheromatosis

Explanation:

Coronary artery disease (CAD) is mainly caused by atherosclerosis. Atherosclerosis is the buildup of plaque (fat, cholesterol, and other substances) in the arteries, which narrows the arteries and reduces blood flow to the heart. Artheronecrosis refers to tissue death in an artery, arteriasclerosis is a general term for hardening of the arteries (but atherosclerosis is a more specific cause related to plaque buildup), and artheromatosis is not the main recognized term for the cause of CAD.

Answer:

atherosclerosis