Sentence Ordering (PQRS) — Arrange parts to build the statement about Einstein (P, Q, R, S given); choose the sequence that yields a grammatical and logical sentence.

Given data

• P: ‘‘Einstein was’’
• Q: ‘‘although a great scientist’’
• R: ‘‘weak in arithmetic’’
• S: ‘‘right from his school days’’

Concept/Approach
Begin with concessive phrase ‘‘although a great scientist’’ (Q), then the subject and verb (P), followed by the main clause complement (R), and finish with the time adverbial (S).

Step-by-step construction
Q → P: ‘‘Although a great scientist, Einstein was...’’P → R: completes predicate: ‘‘...Einstein was weak in arithmetic...’’R → S: adds timeframe: ‘‘...right from his school days.’’Final sentence: ‘‘Although a great scientist, Einstein was weak in arithmetic right from his school days.’’

Why other orders fail
Starting with P removes the concessive emphasis; placing S earlier interrupts the core predicate. ‘‘QPRS’’ preserves cohesion and grammar.

Final Answer
QPRS