Which one is superior compared to eachother: c ,c++ or c#

Answer 1

C and C++ are kings of performance in programming world.

Answer 2

It strongly depends on the area of application, the operating system you are developing for, etc.
In some cases, C is faster than C++, in others it isn't. C++ gives you some nice functionalities which do not exist in C. C# gives you some functionalities which are more difficult to implement in C or C++.
In average, you may pick an overall winner but generally it depends on what you are doing. Just look into the history of the respective languages and you will gain more insight.