Answer:
A. "horror bristling round the head”
Explanation:
The given question refers to the poem A Child's Nightmare written by Robert Graves.
The poem begins with some kind of nightmarish creature scaring the narrator when he was a child in his nursery, and then that same creature leaping on him again from the clank of a night train. This is in fact a night train that transported soldiers during the war. From this moment the war imagery begins. Lines when I'm shot through heart and head and nor the stretcher-bearer's cry are from this part of the poem, as well. The only line that is not an example of war imagery as it is from the first part of the poem is line A: horror bristling round the head.
