The correct answer is: Iron Age.
The Iron Age is a period in the development of human technology, characterized by the widespread use of iron and its alloys, in particular steel. The Iron Age is thought to have begun in the Middle East around 1200 BC, and spread to Europe and Asia over the following centuries.
In India, the Iron Age is thought to have begun around 1000 BC. The first use of iron in prehistoric Bihar began in the Iron Age. Iron was used to make tools, weapons, and other objects. The use of iron led to a number of changes in society, including the development of new technologies and the rise of new social classes.
The Neolithic period is a period in human prehistory characterized by the development of agriculture and the use of stone tools. The Neolithic period began around 10,000 BC and ended around 4,500 BC.
The Chalcolithic period is a period in human prehistory characterized by the development of copper metallurgy. The Chalcolithic period began around 6,000 BC and ended around 3,000 BC.
The Mauryan era is a period in Indian history that lasted from 322 BC to 185 BC. The Mauryan Empire was one of the largest and most powerful empires in Indian history.
The first use of iron in prehistoric Bihar began in the Iron Age. Iron was used to make tools, weapons, and other objects. The use of iron led to a number of changes in society, including the development of new technologies and the rise of new social classes.