The correct option is
A Lung cancer
Lung cancer, also known as lung carcinoma is a malignant lung tumour characterized by uncontrolled cell growth in tissues of the lung. The majority (85%) of cases of lung cancer are due to long-term tobacco smoking. Cigarette smoke contains at least 73 known carcinogens. Across the developed world, 90% of lung cancer deaths in men and 70% of those in women during the year 2000 were attributed to smoking.
So, the correct answer is 'Lung cancer'.