Which of the following is not in connection with blockchain technology?

Which of the following is not in connection with blockchain technology?

a) Peer-to-Peer digital currency
b) Centralized social network
c) Peer-to-Peer social network
d) Distributed Ledger management.

From the BPSC Sub-Assistant Maintenance Engineer October 2022 – Written exam, question 30 of 103.

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