Let consider a senario suppose 2 miner pick up 2 differnet unconfirm transation and they completed the proof of work if miner A add the block first to ...
source https://www.google.com/url?rct=j&sa=t&url=https://stackoverflow.com/questions/54863758/need-help-regarding-blockchain-cryptocurrency&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFzwjDykWwIEJGNKr9-YWFjK04KFg
