Answer:
Option-D
Explanation:
A reflex arc is the neuron pathway which is involved in producing the response to reflex action or the immediate response.
The reflex arc pathway involves the sensory neurons, interneurons and the motor neurons. Although the reflex arc pathway involves the brain later but in producing response the brain is not involved.
The stimuli are perceived by the spinal cord but not the brain therefore the selected option is correct.
Thus, option-D is correct.
