Excitatory ncurotransmitter in brain is

(A) Ach # Acetylcholine# ACETYCHOLINE is distributed throughout the CNS, with high concentrations in the cerebral cortex, thalamus, and various nuclei in the basal forebrain.> Ach was the first neurotransmitter discovered and is the major neurotransmitter in the peripheral nervous system,> Ach is excitatory in contract to monoamine neurotransmitters which are nearly always inhibitory.> Primary monoamine neurotransmitters are dopamine, norepinephrine and serotonin.> Dopamine and epinephrine are primarily inhibitory neurotransmitters that produce arousal.