Option C, speed of light will increase as the light rays moves from water to air.
What is refraction of light?
The refraction of light is the change in speed of light when it moves from one medium to another.
Light travels faster when it moves from a denser medium to a less dense medium while the speed of light decreases when light passes from a less to a more dense medium.
Water is more dense than air, thus speed of light will increase as the light rays moves from water to air.
Option C depicts increase in speed from water to air.
Learn more about refraction of light here: https://brainly.com/question/15838784
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