Answer:
The answer is 1. or "Juan besa la mano de su novia."
Explanation:
This translates to "Juan kisses the hand of his girlfriend," as opposed to the incorrect alternative meaning the same thing, but adding a conditional "a" would make the sentence more intimate toward her hand when it shouldn't be
Tocate la pierna
tocate la cabeza
tocate la nariz
tocate las orejas
tocate el cuello
tocate la cadera
tocate el pie
tocate la cintura