The correct answer is: B. I’ll get
The sentence “Wait there and I’ll get an aspirin for you” is a promise to do something in the future. The speaker is saying that they will get an aspirin for the listener, and they are asking the listener to wait for them to do so.
The other options are not as appropriate in this context. Option A, “I’ve got,” is in the past tense, which does not make sense in a sentence about something that will happen in the future. Option C, “I am getting,” is in the present progressive tense, which could be used in this context, but it is not as clear or concise as option B. Option D, “I got,” is in the past tense, which does not make sense in a sentence about something that is happening in the present.
In conclusion, the correct answer is: B. I’ll get