Select the letter cluster that will replace the question mark (?) in the following series.

ACEGI, BDFHJ, KMOQS, ? , UWYAC, VXZBD

LNPRT

Explanation:

Explanation:

ACEGI, BDFHJ, KMOQS, ? , UWYAC, VXZBD

The logic followed here is :

A → (+1) → B → (+9) → K → (+1) → L → (+9) → U → (+1) → V

C → (+1) → D → (+9) → M → (+1) → N → (+9) → W → (+1) → X

E → (+1) → F → (+9) → O → (+1) → P → (+9) → Y → (+1) → Z

G → (+1) → H → (+9) → Q → (+1) → R → (+9) → A → (+1) → B

I → (+1) → J → (+9) → S → (+1) → T → (+9) → C → (+1) → D

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