Arrange the following historical events related to the development of urban centers and trade infrastructure in Bihar in correct chronological order (from earliest to latest):\n1. Establishment of Rajagriha as a fortified capital with cyclopean stone walls.\n2. Shift of the Magadhan capital to Pataliputra at the confluence of the Ganges and Son rivers by Udayin.\n3. Construction of the royal highway (precursor to Uttarapatha) connecting Pataliputra to Taxila under Chandragupta Maurya.\n4. Emergence of Champa as a major riverine trade port under the Anga Mahajanapada.\nSelect the correct answer using the codes given below:

Options:

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

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