Biology

Answer: A) A heart attack is caused by a blockage in blood flow, while cardiac arrest is caused by an electrical malfunction in the heart.

Explanation:

Correct Option (A): A heart attack (myocardial infarction) occurs when blood flow to a part of the heart is blocked, usually by a blood clot, leading to damage to the heart muscle.
Cardiac arrest, on the other hand, occurs when the heart's electrical system malfunctions, causing the heart to stop beating effectively.

Incorrect Options:

B) A heart attack always leads to ca...