"BIG 3"

Yo Guys,,I have to make a project on "BIG 3 CITIES-UP",,Two cities which I have finalized are Lucknow(Obvious) and Varanasi,,Now,I'm in a dilemma,what should be the third one,I'm confused bw Noida/Kanpur/Prayagraj?I need suggestions from y'all,also would be helpful if y'all can gimme some brief points to write about Lucknow,Varanasi,and the third City as I'm natively from Agra.