Final answer:
The correct tag question to add to the sentence "Neither of the chairs is broken," would be "are they?" because tag questions are positive if the statement is negative, and they must match the verb tense and subject.
Step-by-step explanation:
Kritika said, "Neither of the chairs is broken," which means that both chairs are in good condition. The appropriate tag question to add at the end of this sentence would be "are they?" The rule for forming tag questions is to use a negative statement followed by a question tag that is positive if the statement is negative and vice versa. Since "Neither of the chairs is broken" is a negative statement, the tag question is positive, and it should match the verb tense and subject of the sentence. Therefore, the complete sentence with the tag question is "Neither of the chairs is broken, are they?"