The correct option is C Steel
The speed of the sound depends on the medium in which it travels. Sound travels fastest through solids, slower through liquids and slowest through gases. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it.
Here, the mediums in descending order of speed of sound through them are listed below:
Steel > Water > Air
Sound cannot travel through vacuum as it need s a medium to travel.