Arif has recently quit smoking. what benefit can he expect to occur within a few hours of quitting?

Explanation:

Smoking is a practice in which a material is burned and the smoke is inhaled or breathed. The smoke is absorbed in the bloodstream. The smoking is associated with the direct ailments of respiratory and circulatory system.

Benefits of quitting smoking involves the lowering of the blood pressure and heart rate almost immediately within the few hours of quitting. Thus the risk of heart attack will be reduced. Other benefits are thin blood, lowering in cholesterol levels, cleaning of the lungs, better vision, sharp hearing, clean mouth, clear skin.

its c its is a mixture of gases

the answer would be a