10/20 AQ

[DpR]

I think a K is the most likely hand. A lot of guy would get scared of that J on the turn. I think there is just enough doubt given that he is a donk that you can call the river though. He could have Q10 or 9,10 or some other random nonsense that he decided to bet the flop with. Wouldnt surprise me if you were good here 1 in 5.