The correct answer is A. Plague and Malaria.
Plague and malaria are both vector-borne diseases, which means they are transmitted to humans by an intermediate host, such as a mosquito or flea. Plague is caused by the bacterium Yersinia pestis, which is transmitted to humans by the bite of infected fleas. Malaria is caused by a parasite called Plasmodium, which is transmitted to humans by the bite of infected mosquitoes.
Chicken pox and tetanus are both non-vector-borne diseases. Chicken pox is caused by the varicella zoster virus, which is spread through respiratory droplets. Tetanus is caused by the bacterium Clostridium tetani, which is found in soil and dust.
Mumps and the common cold are both respiratory infections that are spread through contact with contaminated surfaces or through the air when an infected person coughs or sneezes. Eye infections and influenza are also non-vector-borne diseases. Eye infections can be caused by a variety of bacteria, viruses, and parasites, and they are spread through contact with contaminated surfaces or through the air when an infected person coughs or sneezes. Influenza is caused by a virus that is spread through contact with contaminated surfaces or through the air when an infected person coughs or sneezes.