Which of the following is not an infectious disease ?

Options

A. AIDS
B. Cancer
C. Hepatitis-B
D. Typhoid

Answer

To determine which of the following is not an infectious disease, we will analyze each option provided:

1. **AIDS (Acquired Immunodeficiency Syndrome)**:
- AIDS is caused by the Human Immunodeficiency Virus (HIV).
- Since it is caused by a virus, it is classified as an infectious disease.

2. **Cancer**:
- Cancer is not caused by a pathogen (bacteria, virus, or fungi).
- It arises due to abnormal cell division and growth, which is a result of genetic mutations or environmental factors.
- Therefore, cancer is considered a non-infectious disease.

3. **Hepatitis B**:
- Hepatitis B is caused by the Hepatitis B virus.
- This makes it an infectious disease as it can be transmitted from one person to another.

4. **Typhoid**:
- Typhoid fever is caused by the bacterium Salmonella typhi.
- This is also an infectious disease as it spreads through contaminated food and water.

After analyzing all the options, we conclude that the only condition that is not an infectious disease is **Cancer**.

Thus, the answer is **Cancer**.