In which type of dictatorship does a small group of individuals exercise complete control over a country and lsquos government?

In an oligarchy, a small group of individuals exercises complete control over a country's government. This elite group may consist of wealthy individuals, military leaders, or members of a political party, and they often make decisions that serve their own interests rather than the broader population. Oligarchies can exist alongside other forms of government but are characterized by limited political pluralism and restricted civil liberties.