Question
Study the diagram given below and then answer the question that follows:

State the function of the parts labelled 1, 2, 3 and 4.

State the function of the parts labelled 1, 2, 3 and 4.

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| Column A | Column B |
| Degenerative diseases | Vector |
| Diabetes | Filaria |
| AIDS | Viral disease |
| Cholera | Rheumatic heart disease |
| Influenza | Bacterial disease |
| Mosquito | Insulin |
| Elephantiasis | HIV virus |
| - | Entamoeba histolytica |

