Numbness on one side of the body is most likely a symptom of
a. a stroke
b. a heart attack
c. high blood pressure
d. arteriosclerosis

A. A Stroke
Numbness on one side of the body is most likely a symptom of stoke.
A stroke is where blood flow is blocked off in some part of the brain.  The brain is separated into 2 parts, and each side controls the opposite side of the body.  

b.  a heart attack
Numbness of the left arm can be a symptom of a heart attack but that is not the question
Numbness can also be a symptom of Neuropathy caused by diabetes.

Best Answer is A

Out of your list, a stroke.

Yes you do , which is cool