The correct option is option 4 - Fraternity. The attribute in the Preamble that states "No one should treat a fellow citizen as inferior" is Fraternity. Fraternity refers to the idea of brotherhood and a sense of belongingness among the citizens of a country. It emphasizes the need for unity, love, and respect among all individuals, regardless of their differences. This attribute promotes equality and prevents discrimination based on caste, religion, gender, or any other grounds. It highlights the importance of building a harmonious society where everyone is treated with dignity and fairness. Therefore, Fraternity plays a crucial role in ensuring that no citizen is considered inferior and that everyone is given equal opportunities and rights.