$$12-5-2=5$$ 
Bob and Wilson are standing in line. Bob knows that there are $$5$$ people in front of him. Wilson knows that there is a total of $$12$$ people in the line. If Bob is just in front of Wilson, how many of the people in the line are behind Wilson? (Adapted from 2017 Math Kangaroo Problem, Level 1-2, Question \#14) 
Options:
1) $$2$$ 
2) $$3$$ 
3) $$4$$ 
4) $$5$$ 
5) $$6$$ 