<prompt> Remission with SSRI or TCA patient again having relapse. There may be deficiency of ?PyridoxineCobalamineAscorbateRetinol  <response>: Ans. is b i.e., Cobalamine Subjects with vitamin B12 deficiency and depression may present with history of past episodes with spontaneous remission or response to treatment with antidepressants and later recognition or development B1,deficiency 