Which of the following diagrams indicates the best relation between Page, Chapter and Book ?

CFL, EIK, GLJ, IOI, ? 

Directions: In each of the following questions, select the related number from the given alternatives.

130 : 5 : : 1010 :  ?

Which of the following Venn Diagram gives the relationship between Friend, Guide and Philosopher ?

A is 13th from the top, B is 18th from the bottom. When A and B change their position then A becomes 21th from top. What is the new position of B from bottom? 

Introducing a boy Rahul says, "He is the son of the brother of the only daughter of my maternal grandfather". How is the boy related to the Rahul?

oru_o_uxor_x_rux 

A class of boys stands in a single line. One boy is nine tenth in order from both the ends. How many boys are there in the class?