The cell body and synaptic knob are the main parts of neurons.

Concept: The neurons are the building blocks present in the nervous system. These are the cells that help in receiving and transmitting information to the brain.

The basic parts of a neuron are the dendrites, axon hillock, axons, and axon terminal. 

The statement mentioned above is false. The neurons help carry messages or signals of the brain throughout the body. The neurons have three parts: the cell body, the dendrites, and the axon.

Hence, the correct answer is option B.