In the following question, the first sentence (S1) and the last sentence (S6) are fixed. The middle four sentences (P, Q, R, S) are jumbled. Choose the option that provides the correct sequence.

S1: The concept of cultural relativism suggests that a person's beliefs are relative to their own culture. P: This implies that there is no universal standard for moral or ethical judgment. Q: However, an extreme application can lead to the justification of harmful practices. R: Therefore, most contemporary theorists advocate for a moderate form of the concept. S: It challenges ethnocentrism by urging a non-judgemental understanding of different societies. S6: A balanced approach allows for appreciation of cultural diversity while upholding basic human rights.