Select the option that is related to the third letter cluster in the same way as the second letter cluster is related to the first letter cluster.
REG: SDH :: UFC : ?

Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
PDH, RFJ, THL, VJN, ?

This question is based on the following words.
COP, TIK, ANY, CAN, OWN
If in each of the words, each letter is changed to the next letter in the English alphabetical order, how many words thus formed will have no vowel?

What comes next?
PL, OK, NJ, ?

Find the missing term: AZY, BXW, CVU, DTS, ?, FPO.

The given series is a letter cluster series with one term missing. Choose the correct option in place of the question mark and complete the series.
CBDA, GFHE, KJLI, ONPM, SRTQ,?

What should come in place of the question mark (?) in the given series based on the English alphabetical order?
XZR, UWO, RTL, OQI, ?

What should come in place of the question mark (?) in the given series based on the English alphabetical order?
GBD, IDF, KFH, MHJ, ?

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
LDH 14, NFJ 17, PHL 20, RJN 23, ?

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
LIF 13, DAX 24, VSP 46, NKH 90, FCZ 178, ?