Dendrites receive incoming messages from other neurons:
Option (b);
EXPLANATION:
The cells in the nervous system are called neurons. These cells are connected. Neuron is the main source of working input to the human brain. It transfers messages to other nerve cells or muscle cells. The cell body alerts and helps in the function of the neuron.
Dendrites functions to receive the messages that come to other neurons by stretching the parts of the cell body. They then carry the information to the cell body. The contact point where a neuron communicates with the other is called synapses.