Step 1: Analyze the given set.
Thin, Slim, and Slender are not degree words (like positive–comparative–superlative). Instead, they are near-synonyms with subtle differences in nuance, all pointing to leanness.
Step 2: Check each option.
(A) Fat: Plump: Voluptuous — all related to fullness/heaviness, close in meaning, with nuanced connotations. Correct analogy.
(B) Short: Small: Petite — all linked to small size/dimension, again nuanced synonyms. Correct analogy.
(C) Tall: Taller: Tallest — this is a degree sequence (positive, comparative, superlative), not a synonym group. Not analogous.
(D) Fair: Dark: Wheatish — these are contrasting/opposite skin tones, not synonyms. Not analogous.
\[ \boxed{\text{Correct options: (A) and (B)}} \]