<prompt> Which of the following is used to treat painSubcaudate tractotomyCingulotomyTranscutaneous nerve stimulationAll of the above  <response>: There are various modalities of treatment which are tried for chronic pain:-i Pharmacotherapy:- The various drugs mentioned above are used for chronic pain syndrome. The various routes can be used:- oral, intravenous, epidural, or Transcutaneous.ii Neuro-surgical:- Anterolateral cordotomy, dorsal root entry zone lesion, selective rhizotomy, commissural myelotomy, sympathectoning mesencephalic tractomy, cordectomyiii Chemical neurolysis:- Glycerol, alcohol, phenol e.g. intrathecal hyperbaric phenol.iv Other:- Acupuncture, transcutaneous electric nerve stimulation, neuromodulation procedures intracranial stimulation:- deep brainsubcortical and motor cortex stimulation, cryoablation. 