The figure shows an axon terminal and synapse. Select the option giving correct identification of labels $A-D$.

  • A
    $A$ - Action potential,$C$ - Neurotransmitter
  • B
    $B$ - Neurotransmitter,$D$ - Receptor capsules
  • C
    $C$ - Receptor,$D$ - Synaptic vesicles
  • D
    $A$ - Axon terminal,$B$ - Serotonin complex

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