Identify the segment in the sentence which contains a grammatical error.
No sooner did the chairman arrived than the proceedings commenced.

Correct option is B

The segment in the sentence "No sooner did the chairman arrived than the proceedings commenced" that contains a grammatical error is (b) "did the chairman arrived."

• Explanation: When using "did" as an auxiliary verb in the past simple tense, the main verb should be in its base form. Thus, "arrived" should be corrected to "arrive."
• Corrected Sentence: "No sooner did the chairman arrive than the proceedings commenced."