Arrange the following developments in Post-Mauryan stupa architecture in the correct chronological order from earliest to latest: 1. Construction of the original brick core of Sanchi Stupa-1 by Ashoka. 2. Addition of the highly ornamental stone gateways (Toranas) at Sanchi Stupa-1 by the Satavahanas. 3. Construction of the stone railing (Vedika) around the Bharhut Stupa during the Shunga period. 4. The peak phase of white marble relief carvings at the Amaravati Stupa. Select the correct option:

Options:

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

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