They were both correct answers, but Khudzlin's was to a question that was not asked.
The plot values possible in this interaction are:
5 on riddle (always)
2 on harvest (riddle triggers second and resets harvest's value to 0+2)
7 on harvest (harvest triggers second and resets it's own value to 5+2)
Usually in this interaction first player will have control over picking harvest's result (this can influence the decision of the initiative winner).
This is fully confirmed and correct. I hope this is clear now.