From Twitter:

In "Subway," a French romantic dramedy directed by Luc Besson, a man breaks into a woman's house, robs her of her documents and retreats to the subway, where he calls her to demand money--so he can meet her, as he's actually in love with her. We could say he is __.

Choices:
nuts
smitten

Answer And Explanation: Both answers are okay, because 'nuts' means a bit or really very crazy, but smitten means crazy in love.