Antonym of the word

DOLEFUL :

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

VXK, QSF, LNA, GIV, ?

Which of the following terms follows the trend of the given list?

CCABABAB, ACCBABAB, ABCCABAB, ABACCBAB, ABABCCAB, _______________.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

BM, FQ, JU, ?, RC

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

VXK, QSF, LNA, GIV, ?

Which of the following terms follows the trend of the given list?

CCABABAB, ACCBABAB, ABCCABAB, ABACCBAB, ABABCCAB, _______________.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

BM, FQ, JU, ?, RC

Select the missing term based on the given related pair of letter clusters.

ABC : ZYX :: DEF : ____

R+JM2$#QR?*O@7F3

Using the above sequence fill in the blank.

R#* : J?F :: $OJ : ___