Concept:A coherent paragraph flows logically from background to details, then events.Explanation:Start with S1: Al-Biruni’s birthplace. Sentence R comes next: it explains why Khwarizm was important for his education. Sentence Q follows: it describes his language skills after receiving that education. Sentence S is third: it contrasts his knowledge of Greek philosophers despite not knowing Greek. Sentence P ends the sequence: it tells how he was taken to Ghazni by Sultan Mahmud. This order (R → Q → S → P) links ideas smoothly and matches S6 about his later liking for Ghazni.Answer:B. RQSP