Question

Which sentence contains an error in the use of apostrophes? A. The dark maroon sedan is theirs. B. I've done all that I can to get the stain off his shirt. C. It's a dog's life. D. Whose singing the first song in the recital?

Answer 1

D is wrong whose shouldn't be used like that in a sentence it should be who is

Answer 2

D is the correct answer. Whose is used incorrectly in the sentence. The meaning should be "[Who is] singing the first song in the recital" so the correct wording would be "who's" instead of "who is".