The correct answer is 0.90, away from.Concept:Refraction of Light: The bending of the ray of light passing from one medium to the other medium is called refraction.Refractive Index (n): n = sin i / sin r, where 'i' = angle of incidence and 'r' = angle of refraction. Also, n = c/v, where c = speed of light in a vacuum, and v = speed of light in a medium.Explanation:?Relative refractive index:It refers to the refractive index of one material medium with respect to another one.\(n_{21}= \frac{n_{2}}{n_{1}}\)Refractive index of glass (dense flint) with respect to turpentine oil:\(n= \frac{Refractive \ index \ of \ water}{Refractiev \ index\ of\ Turpentine \ oil}= \frac{1.33}{1.47}=0.90\)Greater the refractive index, the denser the medium.Thus, turpentine oil (1.47) is denser than water (1.33).When the ray of light moves from a denser to a rarer medium, the refracted ray moves away from the normal.When the ray of light moves from a rarer to a denser medium, the refracted ray moves towards the normal.Thus, when a light ray will move from turpentine oil to water, it will move away from the normal.The refractive index of turpentine oil with respect to water is 0.90 and the light ray bends away from the normal in the water.