Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of water. Reason (R): The light coming from the stick undergoes scattering from water molecules giving the stick a short and bent appearance.

The correct answer is C because Assertion A is true while Reason R is false. The assertion is correct because when a stick is immersed in water, it appears bent and shorter due to the phenomenon of refraction. Refraction occurs when light travels from one medium to another of different density, in this case, from water to air. As light leaves the water, it speeds up and bends away from the normal, causing the submerged part of the stick to appear closer to the surface than it actually is. The reason is false because the bending appearance is caused by refraction, not scattering. Scattering is the process where light rays are deflected in various directions by particles or molecules, which explains phenomena like the blue color of the sky, but it does not cause the visual bending or shortening of objects in water.