SMALL : MINIATURE expresses a degree or synonym relationship - miniature denotes something very small. EXUBERANT : EXCITMENT shares this pattern, since exuberant describes a state full of excitement. The other options are antonym pairs.
Note: Option 3 contains a spelling issue in the NTA paper ('EXCITMENT' instead of 'EXCITEMENT'). We have interpreted it as the intended word 'EXCITEMENT'.