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Both 1 and 3 correct as per NCERT Ancient India early societies and archaeological timeline.
Ref: NCERT History Class XI Ancient India Chapter 1 Early Societies explains early Indian archaeology periods palaeolithic mesolithic neolithic harappan timeline.
B - (ii) correct per microeconomics basics; central problems scarcity choice opportunity cost.
Ref: NCERT Economics Class XI Chapter 1 Introduction to Microeconomics explains central problems scarcity choice PPC opportunity cost concepts clearly.
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