Concept:The speed of sound in a medium depends on its density and elasticity (bulk modulus).A higher bulk modulus and optimal density increase the speed.Explanation:The speed of sound is given by v=ρB, where B is the bulk modulus and ρ is the density.Sea water contains dissolved salts and minerals, which increase both its density and its bulk modulus compared to pure water.This combination makes sound travel faster in sea water than in distilled water, drinking water, or methanol.Distilled water has the lowest density and bulk modulus among water types, so sound is slower.Drinking water has some impurities but less than sea water, so its speed is intermediate.Methanol, being an alcohol, has much lower density and elasticity than water, resulting in the slowest speed of sound.Typical values: Sea water ~1531 m/s, distilled water ~1498 m/s, drinking water slightly higher than distilled, methanol ~1100 m/s.Thus, among the options, sea water offers the maximum speed of sound.Answer:Sea water (Option B)