pneumonia caused by microorganisms heart problem caused by a high-fat diet lung cancer caused by smoking eye damage caused by ultraviolet light
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which health condition is an infectious disease?
Possibilities:
- pneumonia caused by microorganisms
- heart problem caused by a high-fat diet
- lung cancer caused by smoking
- eye damage caused by ultraviolet light

pneumonia caused by microorganisms