Question

_______ are the boys who came late (pronoun)​

Answer 1

Answer:

They or These are the boys who came late

Answer 2

Answer:

Who/Where/These

Explanation:

'Who are the boys who came late?' can be the answer.

Here who is a relative pronoun.

Or you can say 'Where are the boys who came late.' as it makes sense too and where is also a relative pronoun.