Health help!!!!!!?

Question

Which of the following statements regarding the toxicity of smoke emitted from burning tobaco is true?
a. The smoke has lesser concentrations of tar and nicotine than exhaled smoke.
b. The smoke has a higher concentration of carbon monoxide than exhaled smoke.
c. There is no difference in the concentration of noxious components btween exhaled smoke and smoke emitted from burning tobacco.
d. There are slight increases in certain components of the smoke, but they pose no health risks.

Answer 1

I would go with a, but there is no data with figures to prove either way, smoking is just not good, active or passive, good luck