Choose the grammatically correct sentence: We had to sign there, haven't we?

گرامر کے لحاظ سے صحیح جملے کا انتخاب کریں

We had to sign there, haven't we?

We have to sign there, didn't we?

We had to sign there, don’t we?

We had to sign there, didn't we?

In this sentence, "didn't we" is the correct tag question for the past perfect tense ("had to").

It properly matches the verb tense of the main clause