Introduction:
Many diseases can spread through various means, including through animals and unsanitary conditions. This question asks which combination of animals and conditions can spread diseases. The correct answer is option B, which states that rats and garbage can spread diseases.

Explanation:
Rats and Diseases:
Rats are known carriers of various diseases. They can transmit these diseases to humans through direct contact or through contaminated food and water. Some of the diseases that rats can spread include:

1. Leptospirosis: This bacterial infection can be transmitted through rat urine. It can cause symptoms like fever, muscle aches, and kidney damage.

2. Hantavirus: This virus is primarily transmitted through contact with rat droppings, urine, or saliva. It can cause a severe respiratory illness called hantavirus pulmonary syndrome.

3. Salmonellosis: Rats can carry the bacteria Salmonella, which can contaminate food and cause symptoms like diarrhea, fever, and abdominal cramps.

4. Plague: While rare, rats can also carry the bacteria that causes the plague. This disease can be transmitted to humans through fleas that infest the rats.

Garbage and Diseases:
Unsanitary conditions, such as the presence of garbage, can contribute to the spread of diseases. Garbage attracts pests like rats, flies, and cockroaches, which can then transmit diseases to humans. Here are some examples:

1. Flies: Flies are known to carry various pathogens, including bacteria and viruses. They can contaminate food and surfaces when they come into contact with garbage or other sources of filth.

2. Cockroaches: Cockroaches can spread diseases like salmonellosis and gastroenteritis. They can pick up pathogens from garbage and then transfer them to food and surfaces.

3. Other Pests: Garbage can also attract other pests, such as mosquitoes and rats, which can carry and transmit diseases to humans.

Conclusion:
In summary, rats and garbage can both contribute to the spread of diseases. Rats can carry various pathogens and transmit them to humans through direct contact or contaminated food and water. Garbage attracts pests like rats, flies, and cockroaches, which can also spread diseases. It is important to maintain proper sanitation and pest control measures to prevent the spread of diseases associated with these animals and conditions.

Rats are harmful and garbage also