Question

What is wrong with a sentence?

Answer 1

Answer:

I know a doctor whose last name is Doctodoctor.

If it's "The last names Doctodoctor" then it sounds like you're talking about your last name.

Answer 2

Answer:

What is wrong with the sentence, "I know a doctor which last name is doctodoctor?"

The word "Which" is used. It does not make sense as "which" is usually used for non-living things.

So the correct version is:

I know a doctor whose last name is Doctodoctor.

Mark as Brainliest if it's correct!