Which of the following is a pair of bacterial diseases?

Options

A. Typhoid and pneumonia
B. Malaria and AIDS
C. Ringworm and AIDS
D. Cold and Malaria

Answer

To determine which of the following is a pair of bacterial diseases, we need to analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Diseases**: We need to look at the diseases listed in the options and identify whether they are bacterial diseases.

2. **Analyze Option 1**:
- **Typhoid**: This is caused by the bacterium *Salmonella typhi*, which confirms it as a bacterial disease.
- **Pneumonia**: This is caused by the bacterium *Streptococcus pneumoniae*, making it another bacterial disease.
- **Conclusion for Option 1**: Both typhoid and pneumonia are bacterial diseases, so this option is correct.

3. **Analyze Option 2**:
- **Malaria**: This disease is caused by the *Plasmodium* parasite, which means it is not a bacterial disease.
- **AIDS**: This is caused by the HIV virus, which also confirms it is not a bacterial disease.
- **Conclusion for Option 2**: Since neither disease is bacterial, this option is incorrect.

4. **Analyze Option 3**:
- **Ringworm**: This is a fungal infection, so it is not a bacterial disease.
- **AIDS**: As previously mentioned, this is a viral disease.
- **Conclusion for Option 3**: Both diseases are not bacterial, making this option incorrect.

5. **Analyze Option 4**:
- **Cold**: This is a viral infection, not a bacterial disease.
- **Malaria**: As stated earlier, this is caused by a parasite.
- **Conclusion for Option 4**: Neither disease is bacterial, so this option is also incorrect.

### Final Conclusion:
The only correct pair of bacterial diseases is found in **Option 1**: Typhoid and Pneumonia.