A smoker's cough is a cough resulting from damage in the airways caused by toxins in cigarette smoke. It is generally caused by tar in cigarettes.
Tar contains cancer-causing and many harmful chemicals found in tobacco smoke. On inhalation of this smoke, the tar forms a sticky layer inside the lungs.
This layer damages the lungs and may lead to lung cancer, emphysema, or other lung problems.
It can also cause smoker's cough.
Thus, the correct option is B.
For more details regarding tar in tobacco smoke, visit:
https://brainly.com/question/9821614
#SPJ2
