Read the short passage given below and answer the question from the following given options, that follow according to the passage only:
The U.S. Dollar and the Euro are international reserve currencies. The US Dollar is the official currency in the US and its territories; it is also used in several countries outside the USA as the legal tender. Countries in which the US Dollar is the official currency are: East Timor, Ecuador, El Salvador, Federated States of Micronesia, Marshall Islands, Palau, Panama, and Zimbabwe. The US dollar is pegged by 27 currencies.
The Euro is the sole legal tender in 19 countries of the European Union. Additionally, Andorra, Monaco, San Marino, and the Vatican City use the Euro as their official currency and issue their own coins. Twelve currencies are pegged to the Euro at a fixed exchange rate.
How many currencies are pegged to the Euro at a fixed exchange rate?