Asking about raise in a hand? (1 hand 1 player)

[Briankdk]

3 players, flop comes, 1 player (who is in the hand)  asks "who raised preflop?", Can 1 of  the players in the hand answer ? Can 1 players who is not in the hand answer ?

[Dave Miller]

Poker is a game of observation. Each player should be observant enough to know who bet or raised.

To have a question about a prior street be answered would violate the one-player-to-a-hand rule.

For example, player A raised, player B & C called.

On the next street, player C starts thinking, "wasn't it player A who raised? He never raises," and then asks who made the prior raise. Obviously, getting that information could affect how player C plays out the hand (and maybe even subsequent hands). That could be construed as collusion.

Bottom line: The question should not be answered by anyone.

For the record, I can't remember anyone asking about the prior street while a hand was still in play.

Current street? Sure. When asked, the simple answer, "The guy with the chips in front" is simple and obvious. And acceptable.