How many such pairs of letters are there in the word ‘ANIMATION’ each of which has as many letters between them in the word as in the English alphabet?

Which of the following terms follows the trend of the given list?
ABABAbab, ABABabaB, ABAbabAB, ABabaBAB, AbabABAB, _______________.

Complete the following series –
_ _ aba _ _ ba _ ab

Find the next term in the following series.
ZA5, Y4B, XC6, W3D, _____

What will come in place of question mark(?) in the following number series?

BDE, CFG, EJK,  ?

What comes in place of question mark (?) in the series given below?
W-144, ?, S-100, Q-81, O-64

In the word INSTRUCT, how many alphabets are there between which there are as many letters as there are between them in the English alphabet? 

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
 LOG, FLH, ZII, TFJ, NCK,?