Android Operating system is an example of which kind of

Which among the following set of letters can be placed in the gaps in the given alphabet series to follow a particular pattern?

Select the combination of letter when placed sequentially in the blanks of the given series will complete the series.

RQP, ONM, ____, IHG, FED, find the missing letters

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

Select the combination of letters that when sequentially placed in the blanks of the given series will make it logically complete.

DZL_G_JD_ZHDM_FDPZ_D

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

OA, LG, IM, FS, (?)

Select the letter-cluster that can replace the question mark in the following series.

NU, LW, JY, HA, ?, DE

Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.

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

_ s t _ r _ t u r s _ _ r _ _ u

RRHHHHH, RHRHHHH, RHHRHHH, RHHHRHH, RHHHHRH, _____________.