What do the inductors L2 and L3 do in the following rf power amplifier circuit?
This should explain your questions: -





EDITED SECTION

I was clearly wrong about C5 - upon further inspection it has nothing to do with being part of a tank circuit so apologies for that. And L1 is therefore not a tank inductor but just a collector load of about 240 ohms at midband broadcast FM frequencies.

Here's another attempt to fix my earlier stupidity: -