Select the correct option to test your answer: A Density of the substance to the density of water B Density of the substance to the density of water at 0°C C Density of water at 4°C to the density of the substance D Density of the substance to the density of water at 4°C Correct Answer: Option A (Density of the substance to the density of water) Verified correct option for General Knowledge (GK) (Physics).