Answer:
The correct answer is side-lying position.
Step-by-step explanation:
Opisthotonos refers to a particularly unusual posture related to the conditions and injuries, which damages muscle and brain function. The featured signs of opisthotonos are a severely curved or arched spine, and the head and heels, which tilts backward.
In the given case for the child with meningitis, who suddenly assumes an opisthotonic position the maximal safety and comfort will be ensured with the side-lying position as the neck and back of the child will be hyper-extended.