In which of the following sentences are commas used correctly?

Question

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Helen Keller, prolific author and speaker, could neither see nor hear.
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The woman, who spoke so eloquently, was Helen Keller.
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Although she could neither see nor hear Helen Keller, wrote prolifically.
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Helen Keller, did not let obstacles deter her from reaching her goals.
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Answer 1

The sentences with correctly used commas are:

1. Helen Keller, prolific author and speaker, could neither see nor hear.

   • The commas are correctly placed around the appositive "prolific author and speaker."

2. The woman, who spoke so eloquently, was Helen Keller.

   • The commas are correctly placed to set off the non-defining relative clause "who spoke so eloquently."

The incorrect sentences are:

3. Although she could neither see nor hear Helen Keller, wrote prolifically.

   • This sentence is incorrect because it lacks a necessary comma after "hear" to separate the dependent clause from the main clause.

4. Helen Keller, did not let obstacles deter her from reaching her goals.

   • This sentence is incorrect as the comma after "Keller" should not be there; it incorrectly separates the subject from the verb.

So the first two sentences are the ones that use commas correctly.