Q: Valid English sentence (grammatically) or not: The king of Rock and Roll is more popular than the one of country music.

A: unacceptable

Q: Valid English sentence (grammatically) or not: Buffy couldn't do 100 push ups and anybody laughed.

A: unacceptable

Q: Valid English sentence (grammatically) or not: I have sent 0 letters to Environmental Heath.

A:
acceptable