Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
ZH_ORC_ _K_R_ZH_O_C
1
K, Z, H, K, R, K, R
2
Z, H, K, O, C, K, R
3
K, Z, H, O, C, K, R
4
K, Z, O, R, C, K, R
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
ZH_ORC_ _K_R_ZH_O_C