Concept:The 2021 BRICS Summit, chaired virtually by PM Modi under India's presidency, was the 13th edition of the annual summit.
Explanation:India hosted and held the chairmanship of BRICS in 2021.
PM Modi chaired the BRICS Summit 2021 through a virtual meeting.
This marked India's third time hosting the BRICS Summit, after 2012 and 2016.
The theme of the 2021 summit was "BRICS@15: Intra-BRICS cooperation for continuity, consolidation, and consensus".
The leaders adopted the "New Delhi Declaration" as the outcome document of this summit.
Since the 2021 event was the 13th gathering of BRICS leaders, the correct edition is 13.
Answer:B. 13