Correct Answer : Option (A) - Light
Light :
1. Light doesn't require a medium to travel.
2. It travels in the vaccum with the speed of 1,86,000 miles per second.
Sound :
1. Sound rquire a medium.
2. It travels in the Air with the speed of 340 meters per second.
3. It travels Faster in Water than in Air.
4. It travels Faster in Steel than in Water.