This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
CSF is except 
Select and explain. 
A. Formed mainly in choroid plexus, B. 10% drain cerebral lymphatics, C. Flow from lateral ventricles through, D. Mostly found in pelvic bones than in spine
D: Mostly found in pelvic bones than in spine
Answer: D: Mostly found in pelvic bones than in spine 
Explanation: Cerebro spinal fluid

Clear colorless bodily fluid found in the brain and spine
Produced in the choroid plexus of the brain
Acts as a cushion or buffer for the cortex, providing a basic mechanical and immunological protection to the brain inside the skull
Serves a vital function in cerebral autoregulation of cerebral blood flow.
Occupies the subarachnoid space (the space between the arachnoid mater and the pia mater) and the ventricular system around and inside the brain and spinal cord.
Constitutes the content of the ventricles, cisterns, and sulci of the brain, and central canal of the spinal cord.

Circulation of CSF