(d) Retina
The lens system of the human eye forms an image on the light-sensitive screen called the retina.
Source: Chapter 10, Section 10.1 – The Human Eye
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The passage directly states: "Its lens system forms an image on a light-sensitive screen called the retina." Cornea is the transparent front membrane, ciliary muscles adjust the lens, and optic nerves carry signals to the brain — none of these is the image-forming screen. Just name the correct option and optionally add one supporting line for a 1-mark MCQ.