Find the odd one
1.Dairy, fishing , Foresting
2.operation of sea port and air port
3.Transport, Banking, Communication
4.Education, Health, Training

Dear Student,
Here's your answer -

1. Dairy
2. ambiguous 
3. Banking
4. Training 

These are all the odd words in the list provided above. The second one is not clear. Please clarify that and report your query.

Regards