Most common lung cancer in non- smokers is:

Most common lung cancer in non-
smokers is:
a) Adenocarcinoma
b) Squamous cell carcinoma
c) Oat cell carcinoma
d) None of the above

Correct Answer - A
Ans. A: Adenocarcinoma
Adenocarcinoma accounts for 40% of non-small cell lung cancers. It
usually originates in peripheral lung tissue. Most cases of
adenocarcinoma are associated with smoking; however, among
people who have never smoked (“never-smokers”), adenocarcinoma
is the most common form of lung cancer.
A subtype of adenocarcinoma, the bronchioloalveolar carcinoma, is
more common in female never-smokers, and may have different
responses to treatment.