Looking for a great punchline, for "I'm so old" joke setup.

Looking for a great punchline, for "I'm so old" joke setup.

Joke starts like this: "In my day, Chemistry Class was SO easy. There were only four elements! Earth, Wind, Fire, ........."

Looking for the name of a singer or band for the punchline. Possible choices so far:
" and The Temptations."
" and Led Zeppelin."
" and Iron Butterfly."
(does NOT need to contain any element-like name, but it could)