The correct answer is "You are a fortunate young man"
Step-by-step explanation:
In this excerpt from "In Another Country", the narrator refers to a serious injury in his leg that seems to be the result of the war. About this, he explains his knee does not bend anymore even when he uses a therapy machine.
In this context, the doctor's words can be considered ironic (opposite from the reality or the expectations of the reader) because he tells the main character "You are a fortunate young man". This seems quite contradictory because the man has a serious injury in his leg, and he cannot use the leg anymore, which is the opposite of good fortune.