Choose the correct option. What... you give to your Grandma?

The correct answer is "did". Here is the explanation: We need to choose the correct auxiliary verb to form a question in the past simple tense. The verb "give" is in the base form, which suggests that we are asking about a specific action in the past. Therefore, the correct auxiliary verb to use is "did". The complete question is: "What did you give to your Grandma?" Answer: did