Analogy (progressive shift): AGJ : DKO :: STD : ____. Rule on first pair: +3, +4, +5 shifts across letters.

Introduction / Context:
Analyze AGJ → DKO: A→D (+3), G→K (+4), J→O (+5). Apply the same progressive shifts to STD.

Given Data / Assumptions:

• S(19)+3=V(22)
• T(20)+4=X(24)
• D(4)+5=I(9)

Concept / Approach:
Maintain the increasing shift pattern per position.

Step-by-Step Solution:
Compute V, X, I → “VXI”.

Verification / Alternative check:
Cross-check positions to avoid off-by-one errors.

Why Other Options Are Wrong:
They misapply or reorder the shifts.

Common Pitfalls:
Applying a uniform shift to all letters instead of progressive +3,+4,+5.

Final Answer:
VXI.