Correct option is D
Smoking is a major risk factor for bronchitis, emphysema, and lung cancer. These conditions are part of a group called chronic obstructive pulmonary disease (COPD) and cancer.
Smoking is a major risk factor for bronchitis, emphysema, and lung cancer. These conditions are part of a group called chronic obstructive pulmonary disease (COPD) and cancer.
Suggested Test Series
Suggested Test Series