(a) Poles are a desirable section of society.

This sentence is incorrect.

**Introduction**

The Nazi ideology, as propagated by Adolf Hitler and his party, the National Socialist German Workers' Party (NSDAP), was characterized by extreme racism, anti-Semitism, and the belief in the superiority of the Aryan race. However, one of the options listed above is not a part of Nazi ideology, and it is option 'A' which states that Poles are a desirable section of society.

**Explanation**

1. **Jews as the most inferior and undesirable section of society**: Anti-Semitism was at the core of Nazi ideology. Hitler and his followers believed in the supremacy of the Aryan race and saw Jews as their natural enemies. Jews were subjected to widespread discrimination, persecution, and ultimately the Holocaust, in which millions of Jews were systematically murdered.

2. **Germans as the descendants of the Pure Aryan race**: The Nazis believed that the German people were the descendants of the ancient Aryan race, which they considered to be a superior race. They propagated the idea of racial purity and sought to eliminate any perceived threats to the purity of the German race, including individuals with disabilities, homosexuals, Roma, and others.

3. **Society ruled by Nordic Aryans**: The Nazis believed in establishing a totalitarian state ruled by a select group of Nordic Aryans. They aimed to create a racially homogenous society in which those considered racially and socially inferior would be excluded and oppressed. This ideology led to the implementation of discriminatory laws, such as the Nuremberg Laws, which stripped Jews of their rights and citizenship.

4. **Poles as a desirable section of society**: This statement contradicts Nazi ideology. While the Nazis did not view Poles as equals to the Aryan race, they did not consider them to be desirable members of society either. The Nazi regime sought to subjugate and exploit the Polish people, viewing them as racially inferior and subjecting them to harsh treatment and forced labor.

**Conclusion**

In summary, the Nazi ideology was characterized by extreme racism, anti-Semitism, and the belief in the superiority of the Aryan race. While Poles were not considered desirable members of society by the Nazis, they were still subjected to discrimination and oppression. Option 'A' is the correct answer as it erroneously suggests that Poles were seen as a desirable section of Nazi society.