Correct Answer: ECFSRCW

Solution : Given:
SCR_WS_R_W_C_GWS_RH_

To fill the series we have to divide the series – SCR_W / S_R_W / _C_GW / S_RH_
Let's check each option –
First option: GDFSRCW; SCR G W / S D R F W / S C R GW / S C RH W ( No repeated pattern has been found.)
Second option: HDFSRCW; SCR H W / S D R F W / S C R GW / S C RH W (No repeated pattern has been found.)
Third option: ECFSRCW; SCR E W / S C R F W / S C R GW / S C RH W (A pattern can be observed where it is a set of five letters and in every repetition, the fourth letter is added by 1.)
In SCR E W, E + 1 = F (SCR F W)
In SCR F W, F + 1 = G (SCR G W)
In SCR G W, G + 1 = H (SCR H W)
Fourth option: EDFSRDW; SCR E W / S D R F W / S C R GW / S D RH W ; (No repeated pattern has been found.)

So, only the third option, follows a repeated pattern. Hence, the third option is correct.