In the following question , a series is given with one terms missing . Choose the correct alternative from the given ones that will complete the series :

ABC , DEF , HIJ , ? 

Select the term that will come next in the following series?
CAY, FDB, IGE, ?

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

Arrange the given words in the sequence in which they occur in the dictionary.
i. Accuse
ii. Accustom
iii. Accumulation
iv. Accompany

What will come at the place ___ ?In the given series? 
 BZA, DYC, FXE, ?, JVI

Which is the next term in the following sequence of letter clusters?
PLaN, OJbP, NHcR, MFdT, LDeV,

Find the missing term of sequence.
AB, BA, ABC, CBA, ABCD, ____

Choose the correct alternative from the given ones that will complete the given sequence.
ALN, DNP, GPR, ?