Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.

LAS, NFW, MKD, OPH, LUS, ?

NZW

Explanation:

LAS, NFW, MKD, OPH, LUS, ?

The logic followed here is :

L → (+2) → N → (-1) → M → (+2) → O → (-3) → L → (+2) → N

A → (+5) → F → (+5) → K → (+5) → P → (+5) → U → (+5) → Z

S → (+4) → W → (+7) → D → (+4) → H → (+11) → S → (+4) → W

So, the letter-cluster that replaces the (?) to complete the series is "NZW"