Which is the correct sequence of the components of a reflex arc?
(a) Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord
(b) Receptors→ Motor neuron → Spinal cord → Sensory neuron → Muscle
(c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
(d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Answer : (d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Explanation:

Receptors send impulses to sensory neurons. These impulses are sent to the spinal cord, and the motor neuron then relays them to the muscles.