he _______ friends has come back. (a) and his friends (b) or his (c) along with his (d) along with them. ( option A is not the corret answer. please explain)

A is not correct because his and has are not to be used in single stences

And his friend

Option A

A is not the right option because when you say 'he and his friends' it is plural and 'has' is not used for plural subjects it is used for singular subjects such as 'He has been practising to dance' and have is used for plural.

So probably ' along with his friends is the right answer'

And his

And his