What will be the output of the following C# code?

class box 
{
    int width;
    int height;
    int length;
    int volume;
    void volume(int height, int length, int width) 
    {
        volume = width * height * length;
    } 
}    
class Prameterized_method
{
    public static void main(String args[]) 
    {
       box obj = new box();
       obj.height = 1;
       obj.length = 5;
       obj.width = 5;
       obj.volume(3, 2, 1);
       Console.WriteLine(obj.volume);  
       Console.ReadLine();      
    } 
}

B. 1

C. 6

D. 25

Answer: Option C