Correct option is D
Option (d) No error is the correct answer.
Explanation:
- The sentence is grammatically sound.
- “After seeing that Shreya was in trouble” is a valid subordinate clause.
- The main clause “Rahul quietly stepped up to help” is complete, and the subject-verb structure is appropriate.
- Tenses are consistent (past tense), and punctuation is correct.
Grammatical rule used:
- A complex sentence with a dependent clause ("after seeing...") followed by an independent clause.
- No subject-verb agreement or tense error is present.