Explanation:

- The group of words is "undue favour shown to one’s relatives." This refers to preferential treatment given to family members, especially in professional contexts.

- Option 1: Nepotism

- Favoring relatives by giving them jobs or opportunities unfairly.

- Option 2: Nationalism

- Extreme pride or devotion to one's country, often prioritizing it over other nations.

- Option 3: Despotism

- A system where a single entity rules with absolute power, often oppressive in nature.

- Option 4: Narcissism

- Excessive self-love or self-absorption. Focused on oneself rather than others.