Which letter will replace the question mark (?) in the following series? FLO ,H?Q, JPS, LRU

P M N I

N

Explanation: FLO ,H?Q, JPS, LRU The logic followed here is : F → (+2) → H → (+2) → J → (+2) → L L → (+2) → N → (+2) → P → (+2) → R  O → (+2) → Q → (+2) → S → (+2) → U So, the letter-cluster that replaces the (?) to complete the series is "N"