Identify the sets of diseases in which , A: infectious and B : Non-infectious :

Options

A. A: Pneumonia , B: Malaria
B. A: Cancer , B : AIDS
C. A : AIDS , B: Rheumatoid arthritis
D. A : Cancer, B : Malaria

Answer

To solve the question of identifying the sets of diseases where A is infectious and B is non-infectious, we will analyze the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Infectious vs. Non-Infectious Diseases**:
- **Infectious Diseases**: These are diseases that can be transmitted from one person to another, typically caused by pathogens like bacteria, viruses, fungi, or parasites.
- **Non-Infectious Diseases**: These diseases cannot be transmitted between individuals and are often caused by genetic, environmental, or lifestyle factors.

2. **Analyzing the Options**:
- **Option 1**: A: Pneumonia, B: Malaria
- **Pneumonia**: This is an infectious disease caused by bacteria or viruses.
- **Malaria**: This is also an infectious disease caused by parasites transmitted through mosquito bites.
- **Conclusion**: Both are infectious, so this option is incorrect.

- **Option 2**: A: Cancer, B: AIDS
- **Cancer**: This is a non-infectious disease that arises from uncontrolled cell growth.
- **AIDS**: This is an infectious disease caused by the Human Immunodeficiency Virus (HIV).
- **Conclusion**: This option is incorrect as it misclassifies cancer as infectious.

- **Option 3**: A: AIDS, B: Rheumatoid Arthritis
- **AIDS**: This is an infectious disease caused by HIV and can be transmitted through body fluids.
- **Rheumatoid Arthritis**: This is a non-infectious disease characterized by inflammation of the joints.
- **Conclusion**: This option correctly identifies AIDS as infectious and rheumatoid arthritis as non-infectious.

- **Option 4**: A: Cancer, B: Non-infectious
- **Cancer**: As previously mentioned, this is a non-infectious disease.
- **Conclusion**: This option is incorrect as it misclassifies cancer.

3. **Final Answer**:
- The correct answer is **Option 3**, where A (AIDS) is infectious and B (Rheumatoid Arthritis) is non-infectious.