Fill the blanks to complete the descending-by-2 alphabet letter series (English uppercase): Z, X, __, T, R, __, N, L, J, __, F, D, __. Choose the sequence that correctly fills all four blanks.

Introduction / Context:
Letter-series problems often use fixed alphabetic steps. Here, the visible letters suggest a steady backward movement through the alphabet.

Given Data / Assumptions:

• Series shown with four blanks: Z, X, __, T, R, __, N, L, J, __, F, D, __.
• We work in English uppercase letters with standard A=1 to Z=26 ordering.

Concept / Approach:
Compute step sizes between consecutive visible letters. From Z to X is −2; from T to R is −2; from N to L is −2; from L to J is −2; from F to D is −2. This strongly indicates a uniform −2 step throughout.

Step-by-Step Solution:

Verification / Alternative check:
Writing the full completed run: Z, X, V, T, R, P, N, L, J, H, F, D, B — every step is a −2 jump.

Why Other Options Are Wrong:
Any set containing letters not spaced by −2 at the corresponding positions breaks the uniform step rule. Only “V P H B” preserves −2 at each gap.

Common Pitfalls:
Mixing −1 and −2 steps or alternating steps. Always test several visible gaps to confirm one consistent rule.

Final Answer:
V P H B.