Answer:
d. The European Central Bank, responsible for monetary policy within the European Union.
Step-by-step explanation:
The full form of the ECB is European Central bank. It is the bank that is responsible for the monetary policy for those countries who are the members of the European union that means the person who have adoptred the currency of the euro
So according to the given options, the option d is correct as it met the condition
Therefore the other options are wrong