Concept:To arrange jumbled sentences, find the logical flow: start with the outsider, then introduce the character, describe his appearance, and lead to the final observation.
Explanation:Sentence S1 says the narrator was an outsider with no special matters.
Sentence C introduces another gentleman like the narrator.
Sentence B says that gentleman first attracted the narrator’s attention.
Sentence D evaluates his appearance — not of high birth.
Sentence A gives details: tall, thin, serious, well dressed.
Finally, S2 notes he had no heart for festivities.
This order (C → B → D → A) moves from introduction to description to mood, keeping coherence.
Answer:CBDA (Option A)