Concept:The correct sequence is QRSP because it logically links S1’s general idea to S6’s conclusion.
Explanation:S1 says a large city is the best school for studying life.
Q follows S1 naturally, introducing the reason: in a large city we encounter different types of persons.
R then elaborates on Q by listing examples of those types (rich, poor, proud, humble, etc.).
S generalises that the various facets of life are reflected in a large city, building on R.
P connects directly to S6: if we live in a city for a year or two, we acquire good knowledge of life.
S6 concludes that a city can teach us many aspects of life.
Thus the sequence is S1 → Q → R → S → P → S6.
Answer:QRSP