Port of Spain is the capital city of which country?

Introduction / Context:
Capital cities are a fundamental part of world geography and appear frequently in competitive examinations. Port of Spain is a capital that students often encounter when studying Caribbean countries. This question checks whether you can correctly associate Port of Spain with its country, testing both your map knowledge and your memory of political geography. Knowing such capital country pairs helps build a strong foundation for international affairs, trade and cultural questions.

Given Data / Assumptions:

• The city in question is Port of Spain.
• The options list Saudi Arabia, North Korea, Czech Republic and Trinidad and Tobago.
• The question asks for the country of which Port of Spain is the capital.
• No extra numerical or descriptive data is provided; the answer is factual.

Concept / Approach:
Port of Spain is the capital of Trinidad and Tobago, a twin island nation in the Caribbean Sea off the northeastern coast of South America. The approach is to recall that Saudi Arabia has Riyadh as its capital, North Korea has Pyongyang and the Czech Republic has Prague. By knowing these well known capitals, you can quickly eliminate incorrect options and confirm Trinidad and Tobago as the only correct match for Port of Spain. Regular revision of world capitals makes this type of question straightforward.

Step-by-Step Solution:
Step 1: Identify that the city given is Port of Spain. Step 2: Recall from your study of world capitals that Port of Spain is located in the Caribbean region. Step 3: Remember that Trinidad and Tobago, a Caribbean island nation, lists Port of Spain as its capital. Step 4: Check the options and note that Trinidad and Tobago appears among them. Step 5: Select Trinidad and Tobago as the correct answer because it is the only country for which Port of Spain is the capital city.

Verification / Alternative Check:
You can verify your choice by recalling the capitals of the other countries listed. Saudi Arabia's capital is Riyadh, a large city in the Arabian Peninsula. North Korea's capital is Pyongyang, located on the Korean Peninsula. The Czech Republic has Prague as its capital, a historic European city. None of these is named Port of Spain. Geography atlases and exam oriented guides also clearly label Port of Spain as the capital of Trinidad and Tobago, providing further confirmation.

Why Other Options Are Wrong:
Saudi Arabia does not use Port of Spain as its capital; it uses Riyadh. North Korea has Pyongyang as its seat of government, not Port of Spain. The Czech Republic's capital is Prague, a European city far from the Caribbean. Therefore, all three of these options conflict with established facts about world capitals and cannot be correct in this question.

Common Pitfalls:
Some students may confuse Port of Spain with other Caribbean capitals such as Kingston of Jamaica or Havana of Cuba, especially if they have not systematically revised this region. Others may get distracted by the more familiar names of Saudi Arabia or the Czech Republic and guess without recalling their actual capitals. To avoid such mistakes, it is useful to maintain a structured list of capitals by region and review it periodically, giving special attention to smaller or less frequently mentioned countries like Trinidad and Tobago.

Final Answer:
Port of Spain is the capital city of Trinidad and Tobago, so Trinidad and Tobago is the correct option.