The relationship between the retina and the brain is similar to that between the

Analyze the question: The retina is the light-sensitive part of the eye. It detects light (the stimulus) and converts it into nerve impulses, which are sent to the brain through the optic nerve. The question asks which ear structure has the same relationship with the brain.

Concept:

• Retina = the receptor (sensory organ) of the eye. It converts light into nerve impulses, which go to the brain for interpretation.
• In the ear, the receptor for hearing is the cochlea. Its sensory cells (in the organ of Corti) convert sound vibrations into nerve impulses. These travel via the auditory nerve to the brain.

Step by step:

1. Retina → detects light → impulses → brain (via the optic nerve).
2. Cochlea → detects sound vibrations → impulses → brain (via the auditory nerve).

Now check the options:

• A. Cochlea and auditory nerve: The auditory nerve is only the pathway to the brain. It is not the brain, so this doesn't match.
• B. Cochlea and the brain: The cochlea is the receptor that sends impulses to the brain, just as the retina does. This matches.
• C. Cochlea and semi-circular canals: Both are in the inner ear, and the canals are for balance. This is not a receptor-to-brain relationship.
• D. Eardrum and brain: The eardrum only vibrates and passes sound along. It doesn't convert sound into nerve impulses, so it is not a true receptor like the retina.

Tip: In "similar relationship" questions, match the function. Retina is to the eye what cochlea is to the ear: the receptor that sends impulses to the brain. Remember: Retina sees, cochlea hears, and both report to the brain.