In basic world geography and economy, what is the official currency of the Republic of Cuba?

Introduction / Context:
This question tests fundamental knowledge of world currencies. Competitive exams often include questions asking for the currency of a particular country. Cuba, an island nation in the Caribbean, has the Peso as its currency, and knowing this is part of general economic awareness.

Given Data / Assumptions:
- The country mentioned is Cuba.
- The options are Kuna, Peso, Dollar, None and Euro.
- We assume standard usage where Peso refers to the Cuban Peso used in Cuba.

Concept / Approach:
The approach is straightforward factual recall. Many Spanish speaking or Latin American countries use variants of the Peso. Cuba uses the Cuban Peso. West European nations tend to use the Euro, and Kuna is the currency of Croatia. Dollar is associated with countries such as the United States, Canada and others, not Cuba.

Step-by-Step Solution:
Step 1: Recall that Cuba is a Spanish speaking country in the Caribbean region. Step 2: Remember that several such countries use the Peso as currency, and specifically Cuba uses the Cuban Peso. Step 3: Compare this with the options and identify Peso as the correct one. Step 4: Confirm that none of the other listed currencies match Cuba.

Verification / Alternative check:
As another check, think about travel or foreign exchange context. Tourists visiting Cuba typically exchange their money into Cuban Pesos. Dollar is widely used globally, but it is not the official Cuban currency, even though US Dollar may sometimes circulate informally. Kuna and Euro clearly belong to different geographic regions.

Why Other Options Are Wrong:
Kuna is incorrect because it is the currency of Croatia, a European country, not Cuba.
Dollar is wrong as the official currency of Cuba, despite the influence of the US Dollar internationally.
The option None is incorrect because Cuba clearly has a specific currency and does not use multiple foreign currencies as official tender.
Euro is wrong because it is used by many European Union members but not by Cuba.

Common Pitfalls:
Some candidates may quickly choose Dollar because it is a very famous currency, without considering the regional and linguistic context. Others may confuse Cuba with countries that have adopted the Euro. Remembering a small list of important country and currency pairs can strengthen performance in such questions.

Final Answer:
Hence, the official currency of Cuba is the Peso.