Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
K _ _ N L _ N K _ N _ L N K _ M _ L M _
1
L, M, M, M, K, L, K, N
2
L, M, M, K, K, L, N, N
3
M, M, L, K, K, L, K, N
4
L, M, M, K, K, M, K, N