The correct answer is option (1) because • The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. So, (A) matches with (III) • Synaptic knob possess synaptic vesicles containing chemicals called neurotransmitters. So, (B) matches with (I) • Bipolar neurons have one axon and one dendrite, found in the retina of eye. So, (C) matches with (IV) • Multipolar neurons have one axon and two or more dendrites, found in the cerebral cortex. So, (D) matches with (II) Option (2), (3) and (4) are incorrect as they have mismatches for (A), (B), (C) and (D)