Arrange the following technological and cultural milestones of the Vedic transition to Bihar in chronological order (from earliest to latest): 1. Use of copper and bronze (Ayas) for pastoral and limited agricultural tools in the Saptasindhu region 2. Introduction of 'Shyama Ayas' (iron) in the Ganga-Yamuna Doab 3. Systematic clearing of the dense monsoon forests of Bihar using fire and iron axes 4. Development of intensive wet-rice cultivation (transplantation) in the middle Gangetic plains

Options:

• A: 1-3-2-4
• B: 2-1-3-4
• C: 1-2-3-4
• D: 2-3-4-1

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