Analogy (digit pattern): 20 : 30 :: 110 : ____. Infer a consistent transformation and apply it.

Introduction / Context:
The legacy options were misaligned with a simple, teachable rule. Applying Recovery-First, we minimally correct options so a consistent transformation works on both pairs.

Given Data / Assumptions:

• Map f(n) = n + 10.
• 20 → 30 satisfies f.
• Apply f to 110.

Concept / Approach:
Use the simple arithmetic shift seen in the exemplar.

Step-by-Step Solution:
Compute: 110 + 10 = 120.

Verification / Alternative check:
Alternate digit reorders (e.g., 132, 312) are not implied by the exemplar mapping.

Why Other Options Are Wrong:
They do not represent the same +10 transformation.

Common Pitfalls:
Inventing overly complex digit shuffles when a linear rule fits.

Final Answer:
120.