A form of government that constitutionally permits only one specific political party.

• A. Multiparty democracy
• B. Parliamentary democracy
• C. Nonparty democracy
• D. Single-party government

Answer: (D)

A single-party system describes a form of government in which the constitution grants exclusive political power to one party. In this setup, other political groups are banned or powerless, and elections, if they occur, do not offer genuine competition. Civil liberties and political rights are often restricted to protect the party’s control, and government institutions are aligned with that party. This makes it the best description for a regime that constitutionally permits only one specific political party. The other options imply some degree of political competition or different organizational structures (multiple parties, no formal parties, or a legislative-executive relationship within a democracy) and do not fit the description.