Can I show the foreign country income from 9 flats as one single source or do I need to show it as from 9 different sources?

I have 9 flats in a residential building in India.  I get rental income from these 9 flats. I paid property tax separately for each flat. Can I show the foreign country income from 9 flats as one single source or do I need to show it as from 9 different sources?  Which way is recommended and beneficial for me?