Which type of smoke is the most harmful, because its small particles reach deeper into the lungs?

Question

Quizplus · Accepted Answer

Sidestream smoke is the smoke that is directly released from the burning end of a cigarette and is the most harmful because it contains smaller particles than mainstream smoke, which can reach deeper into the lungs. Primary smoke refers to the smoke inhaled directly by the smoker, while overflow smoke occurs when smoke spills out of the mouth while exhaling. Therefore, D is the best choice for this question.

Which Type of Smoke Is the Most Harmful, Because Its