C

Step 1: Analyze each figure based on the descriptions provided.
Figure 1 shows parallel rays converging at a point, indicating normal vision (not labeled as far-sightedness).
Figure 2 shows a concave lens being used, which is the correct correction for short-sightedness (myopia).
Figure 3 shows rays converging before the retina, typically indicating far-sightedness (hyperopia).
Figure 4 illustrates a convex lens, which is typically used to correct far-sightedness, as it helps focus light on the retina.
Hence, the wrong description is Option C (3 represents far sightedness) because far-sightedness is incorrectly described as converging before the retina.