Assertion : Angina pectoris means ''pain in the chest''.
Reason : It results due to carrying of extra blood to the heart muscle.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

C

Explanation

Angina pectoris literally means "pain in the chest". It results from arteriosclerosis of the arteries that supply the heart muscle itself, i.e., the coronary arteries. Arteriosclerosis is the hardening A of arteries and arterioles due to thickening of the fibrous tissue, and the consequent loss of elasticity.
Due to the lack of required expansion, the arteries are unable to carry extra blood to the heart muscle at the time of stress when the heart is beating more vigorously. Deprived of oxygen the heart muscle experiences constricting pain.