Blockchain transaction unspent This is a bitcoin transaction as shown in a blockchain explorer. What does ‘2 confirmations’ mean here? Sorry for the picture quality.
Which one is the best answer?


2 confirmations by miners are required for this transaction to be accepted by the network
2 other blockchain nodes have confirmed this transaction
The transaction is included in one block (of the blockchain) whose hash is included in the previous block
2 confirmations means the transaction was included in a valid block and that block was continued by another valid block.
Option 3, although it should be next block (older than the one that contains the transaction) instead of previous block.