What song should i choose?

Im trying out for the Air Force Band program as a guitarist. I know what im going to do for parts B, C, D and E. What song should i chose for part A?

Just looking for recommendations of jazz standards, i want something thats going to be challenging to play

(Side note, does anyone know what "chord melody" is? I think i know but ive gotten 2 different answers from a few people so i also want opinions on that)