In which city is the Nobel Peace Prize formally awarded each year under the Nobel Foundation system?

Introduction / Context:
The Nobel Prizes are among the most prestigious international awards, given for achievements in fields such as physics, chemistry, medicine, literature and peace. Most Nobel Prizes are awarded in Stockholm, Sweden, but the Nobel Peace Prize follows a special arrangement and is presented in a different city. This distinction is often tested in general knowledge exams.

Given Data / Assumptions:

- The question is specifically about the Nobel Peace Prize, not the other Nobel Prizes. - It asks in which city the prize is awarded. - The options include Oslo, Stockholm, Radhuset and Spain. - We understand that Radhuset is not a country but a specific building name, and Spain is a country, not a city.

Concept / Approach:
In accordance with Alfred Nobel will, the Nobel Peace Prize is awarded in Oslo, Norway, while the other Nobel Prizes are awarded in Stockholm, Sweden. The award ceremony for the Peace Prize is held at the Oslo City Hall, known locally as Radhuset. Therefore, when asked for the city where the Nobel Peace Prize is awarded, the correct answer is Oslo, not Stockholm or any other option.

Step-by-Step Solution:
Step 1: Recall the special rule that distinguishes the Nobel Peace Prize from the other Nobel Prizes. Step 2: Remember that Alfred Nobel specified in his will that the Peace Prize should be decided and awarded in Norway. Step 3: Recognise that Oslo is the capital city of Norway and the location of the Peace Prize ceremony. Step 4: Note that Stockholm is associated with the other Nobel disciplines, not with the Peace Prize. Step 5: Understand that Radhuset is the Oslo City Hall building, and Spain is a country, so the correct city name to choose is Oslo.

Verification / Alternative check:
News coverage every year clearly shows the Nobel Peace Prize ceremony taking place at Oslo City Hall. Official Nobel Foundation information explains that five Norwegian Nobel Committee members decide the Peace Prize and that the ceremony is held in Oslo. In contrast, Nobel ceremonies in Stockholm are for physics, chemistry, medicine, literature and economic sciences. This consistent pattern confirms Oslo as the right answer to this question.

Why Other Options Are Wrong:
Stockholm is indeed a Nobel city but hosts the prize ceremonies for other fields, not for the Peace Prize. Radhuset is the Norwegian name for the city hall building in Oslo, not a city by itself; the question asks for the city name, which is Oslo. Spain is a country, not a city, and has no special role in the Nobel Peace Prize ceremonies.

Common Pitfalls:
Many students automatically associate all Nobel Prizes with Stockholm and answer Stockholm without carefully reading that the question is about the Peace Prize only. Others may see the unfamiliar term Radhuset and mistake it for a city name. To avoid such errors, remember the simple rule Stockholm for most Nobel Prizes and Oslo for the Peace Prize, and then pick the correct city name rather than the building or the country.

Final Answer:
The Nobel Peace Prize is awarded each year in the city of Oslo, Norway.