Assertion (A): Stimulus is interpreted by the brain and not by sense organs.
Reason (R): Sense organs act as transducers, transforming the stimulus energy.
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
Sense organs usually receive sensory stimulus. This physical stimulus is converted to an action potential by the sense organs and is transmitted through neurons to the brain. And it is in the brain that the action potential of the stimulus is interpreted.