<prompt> A patient has been diagnosed with depression who responds well to MAO inhibitors. Neurotransmitter which is deficient in this patient is produced from ___Raphe nucleus of PonsSubstantia NigraLocus CeruleusHypothalamus  <response>: This patient with depression responds to MAO inhibitors. Hence neurotransmitter deficient is Norepinephrine which is produced by Locus Ceruleus. 