<prompt> Vitamin B12 deficiency can lead to all, except:Megaloblastic aneamia.MyopathyOptic neuritisMyelopathy.  <response>: Vitamin B12 deficiencyA. Hematological manifestationsMegaloblastic anemiaMacrocytic anemiaB. NeurologicalCerebrum dementiaSpinal cord -- myelopathyCranial nerve optic neuritisPeripheral nerve Peripheral neuropathy 