Final answer:
The Government House in Melbourne is designed in the Victorian architectural style, characterized by detailed ornamentation and historic style revival, unlike the later Art Deco style. The correct option is a.
Step-by-step explanation:
The Government House in Melbourne is designed in the Victorian architectural style. This style emerged during the reign of Queen Victoria from 1837 to 1901 and is known for its ornate detailing, eclectic revival and interpretation of historic styles combined with the introduction of new materials of the era.
The Victorian style is distinct from Art Deco, which is characterized by its use of modern materials, geometric motifs, and streamlined forms, emerging predominantly in the 1920s and 1930s.
While Art Deco and Streamline Moderne are significant styles in modern American architecture, they are not representative of the Government House in Melbourne. Options such as Federation style and Brutalist architecture also do not apply to this historical Australian building. The correct option is a.