The correct answer is: A. Small pox
Smallpox is a highly contagious disease caused by the variola virus. It is a serious illness that can cause death. Smallpox was once common in many parts of the world, but it has been eradicated since 1980.
Malaria is a disease caused by a parasite that is spread to humans through the bite of an infected mosquito. Malaria is a serious illness that can cause death. It is a major problem in many parts of the world, especially in Africa.
Measles is a disease caused by a virus. It is a serious illness that can cause death, especially in young children. Measles is a major problem in many parts of the world, especially in Africa.
Cholera is a disease caused by a bacterium. It is a serious illness that can cause death, especially in young children. Cholera is a major problem in many parts of the world, especially in Asia.
Smallpox is the only disease on the list that has been eradicated. This means that there are no longer any cases of smallpox in the world. The World Health Organization (WHO) declared smallpox eradicated in 1980. This was a major achievement in
public health.The other diseases on the list are still common in many parts of the world. Malaria is a major problem in Africa, measles is a major problem in Africa, and cholera is a major problem in Asia. These diseases can be prevented through vaccination.