**Core Concept**
The question pertains to the epidemiological and pathological characteristics of lung carcinoma, specifically regarding its association with smoking and genetic mutations.

**Why the Correct Answer is Right**
Lung carcinoma, particularly non-small cell lung carcinoma (NSCLC), is strongly associated with smoking, accounting for approximately 80-90% of all cases. The most common genetic mutations involved in NSCLC are EGFR mutations, ALK rearrangements, and ROS1 rearrangements, which are more commonly found in non-smokers. The presence of these mutations can guide targeted therapies. The correct answer choice should reflect this relationship between smoking and the genetic characteristics of lung carcinoma.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because while smoking is a risk factor for lung carcinoma, it is not a direct cause of the disease. Smoking increases the risk of developing lung carcinoma by damaging the DNA of lung cells, but it is not the primary mechanism by which the disease develops.
**Option B:** Incorrect because lung carcinoma is not primarily caused by a viral infection. While some viruses, such as HPV, can cause cancer, lung carcinoma is not typically associated with viral infections.
**Option C:** Incorrect because while some people with lung carcinoma may have a family history of the disease, there is no strong evidence to suggest that lung carcinoma is caused by a single genetic mutation. The disease is often the result of a combination of genetic and environmental factors.

**Clinical Pearl / High-Yield Fact**
Smokers are at increased risk of developing lung carcinoma, with the risk increasing with the number of cigarettes smoked per day and the duration of smoking. Quitting smoking can significantly reduce the risk of developing lung carcinoma.

**Correct Answer:** C.