Lung cancer is a

Options

A. Carcinoma
B. Sarcoma
C. Malignant lymphoma
D. Sarcoma is a malignancy of

Answer

### Step-by-Step Solution:

1. **Understanding Lung Cancer**: Lung cancer is a type of cancer that primarily affects the lungs. It often begins in the cells that line the bronchi, bronchioles, and alveoli.

2. **Identifying the Types of Cancer**: The question provides four options: carcinoma, sarcoma, malignant lymphoma, and another mention of sarcoma. We need to identify which category lung cancer falls into.

3. **Defining Carcinoma**: Carcinoma refers to cancers that originate in epithelial tissues. Epithelial tissues are found throughout the body, including the skin and the lining of organs and passageways.

4. **Defining Sarcoma**: Sarcoma is a type of cancer that arises from connective tissues such as bones and muscles. It does not pertain to lung cancer as it is not derived from epithelial tissue.

5. **Defining Malignant Lymphoma**: Malignant lymphoma is a cancer that starts in the lymphatic system. This type of cancer is also not related to lung cancer, as lung cancer does not originate in the lymphatic system.

6. **Conclusion**: Since lung cancer starts in the epithelial cells lining the lungs, it is classified as carcinoma. Therefore, the correct answer to the question "Lung cancer is a" is carcinoma.

### Final Answer:
Lung cancer is a carcinoma.

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