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Explanation:

1c) nucleus -> 2b) cell body;

              1b) myelin sheath -> 2a) axon

              1a) cell membrane -> 2c) dendrite

Explanation: Neurons are the main unit, the cells, of the nervous system. It consists of 3 parts: cell body, dendrites and axon.

Cell body contains nucleus and citoplasm.

An axon extends from the cell body and ends at nerve terminals. Some axons are covered with myelin sheath, because it accelerates the passage of the electrical signal.

A dendrite is an extension of cell body and it is "the one" which receives the message from other neurons. It is formed of cell membrane.