River raise by nit??

[LOwrestling2001]

Villain is like..12/5/2 over 200 hands or so, so i call PF. Turn checks through so i figure i might be good here. Is this a C/C or a B/F? or is it a B/C? I am just slightly baffled because what does he have, a horrible played 22? AA?

PokerStars No-Limit Hold'em, $1.00 BB (4 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($98.50)
UTG ($95.50)
Button ($101.60)
SB ($173.10)

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises to $4</font>, <font color="#666666">2 folds</font>, Hero calls $3.

Flop: ($8.50) 7[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets $5</font>, Hero calls $5.

Turn: ($18.50) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, UTG checks.

River: ($18.50) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $10.5</font>, <font color="#CC3333">UTG raises to $33</font>, Hero scratches head...

Final Pot: $84.50