Which sentence below is correctly punctuated?

Only those students, who have signed permission slips, will be allowed to participate.
Only those students who have signed permission slips, will be allowed to participate.
Only those students, who have signed permission slips will be allowed to participate.
Only those students who have signed permission slips will be allowed to participate.

Question

Which sentence below is correctly punctuated?

 Only those students, who have signed permission slips, will be allowed to participate.
 Only those students who have signed permission slips, will be allowed to participate.
 Only those students, who have signed permission slips will be allowed to participate.
 Only those students who have signed permission slips will be allowed to participate.

kaloemalia · Answer

C, I believe

mtalhahassan2 · Answer

I thought it be B

mtalhahassan2 · Answer

I guess so

anonymous · Answer

Okay, still guessing since there's more than one prediction.

superflytyguy · Answer

Only those students, who have signed permission slips, will be allowed to participate. 

Comma represents an appositive phrase indicating WHICH KIND of students

kaloemalia · Answer

@PoppyGirl63 honestly, I'd trust @SuperflyTyGuy , he knows what he's talking about

superflytyguy · Answer

Thanx @KaloeMalia

anonymous · Answer

Okay @KaloeMalia I will. Thanks @SuperflyTyGuy !!!

kaloemalia · Answer

:) @PoppyGirl63  @SuperflyTyGuy

superflytyguy · Answer

yw ;D

mtalhahassan2 · Answer

so  did u get a correct sentence for this