Choose the sentence that uses the correct question tag:

The correct answer is Option (4) → There is a puncture repair shop at the next petrol pump, isn’t there?

Question tag after “There is”:

After “There is” or “There are”, 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: Grandma lit the diya before sunset, hasn’t she? — Incorrect. The given sentence says “lit”. It is in the simple past with no helping verb. So the tag uses “didn’t”, not “hasn’t”.
Corrected: Grandma lit the diya before sunset, didn’t she?

Option 2: There are a few biscuits left in the tin, aren’t they? — Incorrect. The given sentence begins with “There are”, but the tag says “they”. The tag must keep “there”.
Corrected: There are a few biscuits left in the tin, aren’t there?

Option 3: Arun won’t eat brinjal at the party, won’t he? — Incorrect. The sentence has “won’t”, so it is negative. A negative sentence takes a positive tag.
Corrected: Arun won’t eat brinjal at the party, will he?