What should come in place of the question mark (?) in the given series, based on the English alphabetical order?
RJV QIU PHT OGS ?

The correct answer is NFR.

To find the missing term in the given series RJV, QIU, PHT, OGS, ?, let us analyze the pattern followed by the letters in each position according to their position in the English alphabetical order.

1. First Letter Pattern:
R (18) → Q (17) → P (16) → O (15) → ?
Each step subtracts 1 from the alphabetical position.
15 - 1 = 14, which corresponds to the letter N.

2. Second Letter Pattern:
J (10) → I (9) → H (8) → G (7) → ?
Each step subtracts 1 from the alphabetical position.
7 - 1 = 6, which corresponds to the letter F.

3. Third Letter Pattern:
V (22) → U (21) → T (20) → S (19) → ?
Each step subtracts 1 from the alphabetical position.
19 - 1 = 18, which corresponds to the letter R.

Combining the letters obtained for each position gives NFR.