Answer:
B) Squamous cell carcinoma of the esophagus
Explanation:
In a short answer, the man is suffering from esophagus cancer. It is often lethal, and is usually associated with excessive smoking and drinking (along with old age).
The phrase "squamous cell carcinoma" can be interpreted as "cancer of the squamous cells". Squamous epithelial cells are the cells that line the esophagus and make it possible for the "swallowing action" to happen.