And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they?
Answered - to my thoughts: asked the question naturally arising in John's mind from what went before. One of the 24 elders, representing the Old and New Testament ministry, appropriately is interpreter of this vision of the glorified Church.
What ... 'These which are arrayed in white robes, WHO are they?'