Given the following C# code: class Program { static void Main(string[] args) { derivedClass obj = new derivedClass (); obj.var1 = 1; obj.var2 = 2; obj.display(); Console.ReadKey(); } } class baseClass { public int var1; private int var2; } class derivedClass : baseClass { public void display() { base.var2 = base.var1 + 1; Console.Writeline(base.var1 + + base.var2); } What will be the output of this code? а. 12 b. 13 C. 23 d. Compile time error

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