Q: Valid English sentence (grammatically) or not: The lady singing with a boy is a genius, isn't he?
OPTIONS:
- unacceptable
- acceptable

A: acceptable

Q: Valid English sentence (grammatically) or not: I gushed the fountain.
OPTIONS:
- unacceptable
- acceptable

A: unacceptable

Q: Valid English sentence (grammatically) or not: It was a first edition of Richard III that Ann bought for $1000.
OPTIONS:
- unacceptable
- acceptable

A:
acceptable