Choose the sentence that uses the correct question tag:

The correct answer is Option (3) → There is a long queue at the ration shop today, isn’t there?

Question tag after “There is”:

When a sentence begins with “There is”, the tag keeps “there” in place of a pronoun. The sentence is positive, so the tag is negative: “isn’t there”.

Why the Other Options are Incorrect?

Option 1: Kabir’s mother is a nurse in Pune, isn’t he? — Incorrect. The tag uses the pronoun for the subject. The subject is “mother”, not “Kabir”. So the pronoun is “she”.
Corrected: Kabir’s mother is a nurse in Pune, isn’t she?

Option 2: Seema can’t come to the wedding, can’t she? — Incorrect. The sentence has “can’t”, so it is negative. A negative sentence takes a positive tag.
Corrected: Seema can’t come to the wedding, can she?

Option 4: The children went to the zoo yesterday, haven’t they? — Incorrect. The given sentence says “went”. It is in the simple past with no helping verb, so the tag uses “didn’t”, not “haven’t”.
Corrected: The children went to the zoo yesterday, didn’t they?