I'm pretty sure the answer is "Fold pre"
However I have so much equity on the flop, and more on the turn, I kept going.
PokerStars - $1 NL (6 max) - Holdem - 5 players
Hand converted by PokerTracker 4
SB: 124.66 BB
BB: 144.35 BB
Hero (UTG): 72.22 BB
CO: 80 BB
BTN: 154.13 BB
SB posts SB 0.5 BB, BB posts BB 1 BB, CO posts penalty blind 1 BB
Pre Flop: (pot: 2.5 BB) Hero has A♣:8♣:
Hero raises to 2.9 BB, CO calls 1.9 BB, fold, SB calls 2.4 BB, fold
Flop: (9.7 BB, 3 players) 7♠:6♣:T♣:
SB checks, Hero checks, CO bets 4.61 BB, SB raises to 12.83 BB, Hero calls 12.83 BB, CO calls 8.22 BB
Turn: (48.19 BB, 3 players) 4♠:
SB bets 27.89 BB, Hero calls 27.89 BB, fold
River: (103.97 BB, 2 players) Q♦:
SB bets 81.04 BB and is all-in, fold
SB wins 101.47 BB
Rake paid 2.5 BB