The correct option is A real
The word 'fictitious' refers to being imaginary or fabricated.
Option A, real refers to something genuine, not imagined or supposed.
Option B, imaginative refers to having or showing creativity or inventiveness.
Option C, fancy refers to something elaborate in structure or decoration.
Option D, foreign refers to dealing with or relating to other countries.
Thus, according to the meaning, the word 'real' is the opposite of the word 'fictitious'.