Question
Directions: In the following question, some part of the
sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'. They learned the same things, (A) /so they could help one other with the (B) / homework and talk about it. (C) / No error (D)Solution
Replace ONE OTHER with ONE ANOTHER.  Please note: Each other refers to two people and one another refers to more than two people. Here the number of people is not specified/clear, thus both can be used here
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