Which of the following terms will replace the question mark (?) in the given series?JPNH, IRMI, HTLJ, GVKK, ?

Let's look at the letter shifts position by position:First letter: $\text{J}\stackrel{-1}{\to }\text{I}\stackrel{-1}{\to }\text{H}\stackrel{-1}{\to }\text{G}\stackrel{-1}{\to }\mathbf{F}$ Second letter: $\text{P}\stackrel{+2}{\to }\text{R}\stackrel{+2}{\to }\text{T}\stackrel{+2}{\to }\text{V}\stackrel{+2}{\to }\mathbf{X}$ Third letter: $\text{N}\stackrel{-1}{\to }\text{M}\stackrel{-1}{\to }\text{L}\stackrel{-1}{\to }\text{K}\stackrel{-1}{\to }\mathbf{J}$ Fourth letter: $\text{H}\stackrel{+1}{\to }\text{I}\stackrel{+1}{\to }\text{J}\stackrel{+1}{\to }\text{K}\stackrel{+1}{\to }\mathbf{L}$ Combining the results gives FXJL.