Among the noninfectious diseases, which of the following is most common fatal diseases of human beings?

Options

A. AIDS
B. Cancer
C. Cystic fibrosis
D. Cholera

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the most common fatal disease among non-infectious diseases. This means we need to identify diseases that are not caused by pathogens (like bacteria or viruses) and are not transmissible.

2. **Evaluating the Options**:
- **Option 1: AIDS**: AIDS (Acquired Immunodeficiency Syndrome) is caused by the HIV virus and is transmitted through sexual contact, blood transfusions, and from mother to child. Since it is caused by an infectious agent, it does not qualify as a non-infectious disease.

- **Option 2: Cancer**: Cancer is characterized by the uncontrolled division of somatic cells, leading to the formation of tumors. It is a non-communicable disease and can be fatal, making it a strong candidate for the answer.

- **Option 3: Cystic Fibrosis**: Cystic fibrosis is a genetic disorder that affects the lungs and digestive system. While it is a serious condition, it is not typically classified as a common fatal disease compared to cancer.

- **Option 4: Cholera**: Cholera is an infectious disease caused by the bacterium Vibrio cholerae, which spreads through contaminated food and water. Since it is infectious, it does not fit the criteria for non-infectious diseases.

3. **Conclusion**: After evaluating all options, the most common fatal non-infectious disease among the choices provided is **Cancer**.

### Final Answer:
The most common fatal non-infectious disease among the options given is **Cancer**.

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