Correct Answer: LLKL

Solution : Given:
KK_LL_K_L_LL

Divide the series into letter clusters – KK _LL_ / K_ L_LL
Let's check each option –
First option: LKML; KK L LL K / K M L L LL (No repeated pattern found.)
Second option: LKKK; KK L LL K / K K L K LL (No repeated pattern found.)
Third option: LLKL; KK L LL L / K K L L LL (KKLLLL is repeated in the series.)
Fourth option: LKKL; KK L LL K / K K L L LL (No repeated pattern found.)

So, the series becomes→KKLLLLKKLLLL. Hence, the third option is correct.