Which is not cancer

Options

A. Leukemia
B. Glaucoma
C. Carcinoma
D. Sarcoma

Answer

To determine which option is not a type of cancer, we can analyze each of the given terms:

1. **Leukemia**: This is a type of cancer that affects the blood and bone marrow. It is characterized by the uncontrolled production of abnormal white blood cells.

2. **Carcinoma**: This is a type of cancer that originates in the epithelial cells, which line the organs and tissues of the body. Carcinomas are among the most common types of cancer.

3. **Sarcoma**: This is another type of cancer that arises from connective tissues such as bone, cartilage, fat, and muscle.

4. **Glaucoma**: This is not a type of cancer. Instead, it is a disease of the eye that leads to damage of the optic nerve, often associated with increased pressure in the eye.

From this analysis, we can conclude that the option that is not a cancer is **Glaucoma**.

### Step-by-Step Solution:
1. **Identify the options**: The options provided are Leukemia, Glaucoma, Carcinoma, and Sarcoma.
2. **Define each term**:
- Leukemia: Blood cancer.
- Carcinoma: Cancer of epithelial tissues.
- Sarcoma: Cancer of connective tissues.
- Glaucoma: An eye disease, not cancer.
3. **Determine which is not cancer**: By evaluating the definitions, we see that Glaucoma is the only option that does not refer to a type of cancer.
4. **Conclude**: The answer is Glaucoma.