Which of the following statement is

What should come in place of '?' in the given series?

3  21  111  561  2811 ?

Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.

Select the figure that will come next in the following figure series.

Statement. To maintain the structure of the Taj Mahal, a revival of Yamuna river is necessary. 

Choose one of the following options. 

Select the figure from among the given options that can replace the question mark (?) in the following series.