Final answer:
The sentence should read, 'Nimisha told them that she could respond to their complaints only after she got back from her holidays the next week.'
The correct sentence to rewrite Nimisha's statement is option B.
Step-by-step explanation:
To rewrite the original sentence correctly while maintaining the reported speech, the correct option is B. Nimisha told them that she could respond to their complaints only after she got back from her holidays the next week. This follows the rules of changing direct speech into indirect speech, where we typically shift the tense back, and pronouns should be changed to fit the perspective of the reported statement.
Now, let's address the comma insertion questions. In sentence 2 for example, the comma before 'and' is incorrectly placed because the second clause is not independent. For sentence 4, the list items need commas in between, and the comma before 'and' should not be there as 'and' is already coordinating the last two items in the list.
B. Nimisha told them that she could respond to their complaints only after she got back from her holidays the next week. is the correct statement.