"Johnny Got His Gun" is actually a novel that was written by Dalton Trumbo. This novel actually promotes anti-war. And based on this novel, the significance of the physical condition of the narrator is that he still shows patriotism despite his physical condition. The answer is the last option. Hope this helps.
In Johnny Got his Gun, what is the significance of the narrator’s physical condition? War has left him totally helpless. He does not feel pity for himself. He wants to help raise money for the war effort. He is patriotic despite his physical condition