Air borne diseases are

Options

A. Typhoid, Ascariasis
B. Pneumonia, common cold
C. Amoebiasis, malaria
D. Pneumonia, filariasis

Answer

### Step-by-Step Solution:

1. **Understanding Airborne Diseases**:
- Airborne diseases are illnesses caused by pathogens (like bacteria or viruses) that are transmitted through the air. These pathogens can be inhaled or come into contact with mucous membranes in the respiratory tract.

2. **Identifying Examples of Airborne Diseases**:
- Common examples of airborne diseases include pneumonia and the common cold. Both of these diseases are caused by pathogens that can be spread through the air.

3. **Evaluating the Options**:
- **Option 1: Typhoid and Ascaris**:
- Typhoid is a waterborne disease, and Ascaris is a foodborne disease (caused by ingesting eggs). Neither of these is airborne.
- **Option 2: Pneumonia and Common Cold**:
- Both of these are indeed airborne diseases as they are transmitted through respiratory droplets in the air.
- **Option 3: Amoebiasis and Malaria**:
- Amoebiasis is caused by contaminated water, and malaria is transmitted by mosquito bites. Neither is airborne.
- **Option 4: Pneumonia and Filariasis**:
- While pneumonia is airborne, filariasis is caused by parasitic worms and is not transmitted through the air.

4. **Conclusion**:
- The only correct option that includes both diseases classified as airborne is **Option 2: Pneumonia and Common Cold**.

### Final Answer:
The correct answer is **Pneumonia and Common Cold**.

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