Reflex arcs are evolved in animals for quick and efficient responses. Which one of the following sequences correctly represents a reflex arc?
1
Receptor - Sensory neuron - Relay neuron in spinal cord - Brain - Motor neuron - Effector
2
Receptor - Sensory neuron - Brain - Relay neuron in spinal cord - Motor neuron - Effector
3
Receptor - Motor neuron - Relay neuron in spinal cord - Sensory neuron - Effector
4
Receptor - Motor neuron - Brain - Sensory neuron - Effector