Correct Answer - Option 4 : OQLKQK
According to the given information we have to check the options one by one :
Option 1) L O Q K C L O Q O C L O Q C C
Option 2) L Q O K C L O Q K C L O Q K C
Option 3) L O K K C O O Q Q C L O C Q C
Option 4) L O Q K C L O Q K C L O Q K C
Option (4) is giving a pattern of LOQKCLOQKCLOQKC.
No other option is giving any particular pattern.
Hence, the correct answer is "OQLKQK".