Sidharth is a chain smoker. He got into this habit in early adolescence due to peer pressure and gradually got addicted to this habit. Now for 20 years he has been in the habit of smoking. Since few months is experiencing pain in chest, shortness of breath, wheezing and chronic cough with phlegm. He seeked advice of a medical practitioner who diagnosed him with lung cancer. Based on the above information, answer the following questions. How is lung cancer diagnosed?

Options

A. Computerised tomography scan
B. Sputum cytology
C. Biopsy of lung tissue
D. All of these

Answer

D