Which of the following statements regarding Blockchain is NOT true?

The statement that blockchain is designed as a centralized solution for a single entity to control and validate all transactions is not true. The fundamental characteristic of blockchain technology is its decentralized nature, which allows for increased security and transparency. In a blockchain, records (or blocks) are linked together in a chain and secured using cryptographic methods. This design prevents any single entity from having control over the entire network, thereby enhancing trust among participants.

Blockchain operates as a distributed digital ledger where all transactions are accessible for verification by any participant on the network. This distribution promotes transparency and reduces the risk of fraud. In contrast, traditional databases are typically maintained under centralized control, meaning that one organization or entity has sole authority over the data and its access. This centralization can lead to vulnerabilities and a lack of transparency that blockchain effectively addresses.

Thus, answer D is incorrect because it misrepresents the decentralized and collaborative nature of blockchain, which is one of its most significant advantages.