Arrange the following architectural developments in Bihar in chronological order (from earliest to latest): 1. Excavation of the Barabar Caves by Ashoka and Dasharatha. 2. Construction of the stone railing around the Mahabodhi Temple during the Sunga period. 3. Excavation of the Son Bhandar Caves in Rajgir. 4. Construction of the main pyramidal brick tower of the Mahabodhi Temple. Select the correct answer using the codes given below:

Options:

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

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