Which planet is known as the 'Blue

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.

Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.

k_Imml_mk_mmk_Ikkl_m

Answer the questions based on the information given below:

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. NIR, JGN, FEJ, ?

Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.

_SWWS_WWWS_SWWWW_SSS

Which one set of the letters when sequentially placed at the gaps in the given letter series shall complete it?

Which among the following word cannot be formed using the letters of the given word only once?

CONTRADICTION