With reference to "Blockchain Technology", consider the following statements:

1. It is a public ledger that everyone can inspect, but which no single user controls.
2. The structure and design of blockchain is such that all the data in it are about cryptocurrency only.
3. Applications that depend on basic features of blockchain can be developed without anybody's permission. Which of the statements given above is/are correct?

Blockchain technology is a distributed, public ledger that stores transactional records in blocks, forming a chain.

Statement 1 is correct: It is a public ledger accessible to everyone, ensuring transparency, but no single user has control, ensuring decentralization.

Statement 2 is not correct: While blockchain is famously used for cryptocurrencies like Bitcoin, its applications extend far beyond. It can store various types of data, including information about supply chains, healthcare records, and voting systems. The 'blocks' store digital information about transactions (date, time, amount) and participants using a unique digital signature, not necessarily tied to cryptocurrency.

Statement 3 is correct: Blockchains can be permissionless (public) or permissioned (private). Public blockchains, like the one associated with Bitcoin, allow anyone to develop applications without requiring permission, fostering innovation and decentralization.

Hence, statements 1 and 3 are correct.

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