Ependymal cells are mainly involved in:
Correct option is C, CSF production and circulation. In Neuron; Structure and Function, the accurate description is CSF production and circulation, and that is what you should commit to memory. Keep the definition tight and the role clear — the functional job described in the stem is exactly what CSF production and circulation does in Neuron; Structure and Function. Then CSF production and circulation is the answer you can defend. Check yourself by covering the options and writing the answer first, then matching the letter — that builds confidence. If the wording feels dense, translate it into everyday language first, then map that plain sentence back onto CSF production and circulation.
Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.