What will be the output of the following Java program?

class output 
{
   class output 
   {
     public static void main(String args[])
     {
        char c[]={'A', '1', 'b' ,' ' ,'a' , '0'};
        for (int i = 0; i < 5; ++i)
        {
               i++; 
               if(Character.isDigit(c[i]))
                   System.out.println(c[i]+" is a digit");
               if(Character.isWhitespace(c[i]))
                   System.out.println(c[i]+" is a Whitespace character");
               if(Character.isUpperCase(c[i]))
                   System.out.println(c[i]+" is an Upper case Letter");
               if(Character.isLowerCase(c[i]))
                   System.out.println(c[i]+" is a lower case Letter");
               i++;
        }
    }
}

A. a is a lower case Letter
  is White space character

B. b is a lower case Letter
  is White space character

C. 1 is a digit
a is a lower case Letter

D. a is a lower case Letter
0 is a digit

Answer: Option C