Select the relevant C# code set to fill up the blank for the following C# program?

[answerhappygod]

static void Main(string[] args) { int x = 10, y = 20; int res; /*_______________*/ Console.WriteLine(res); }
a) x % y == 0 ? (x == y ? (x += 2):(y = x + y)):y = y*10;
b) x % y == 0 ? y += 10:(x += 10);
c) x % y == 0 ? return(x) : return (y);
d) All of the mentioned