Dr.Octopus research categories. Which is which?

DHCVoLt

He has 3 but which is which? My guess is biology is the green heart symbol, chemistry the purple flask, and physics the yellow nuclear symbol. Is there any way to figure this out besides checking which ones go up when I do the specific actions, I can't really test that without my own,

Mr_Platypus

I'd say you nailed it