Q: Hash is used to ensure integrity of the data transmitted in the blockchain network.  

Answer: B

True.

Hash is commonly used in the blockchain network to ensure the integrity of data. A hash function is a mathematical function that takes an input (data) and produces a fixed-size output (hash). This output is unique to the input data and any change in the input data will result in a different hash value. In the blockchain, each block contains a hash of the previous block in the chain, which creates an immutable record of all the previous transactions. This ensures that the data stored on the blockchain cannot be altered or tampered with, providing a high level of security and integrity to the network. Additionally, hash functions are used to verify the authenticity of digital signatures, which are used to ensure the identity of the sender and receiver in a transaction.

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