Pick which sentence is not logical.\nOptions:\n- Sentence A: "let's go to the supermarket to buy the food for the barbecue"\n- Sentence B: "let's go to the supermarket to buy the exam for the barbecue"\n
Please answer the following question by reasoning step-by-step.
Sentence B
You cannot buy an exam from a supermarket.

.

Thus, the answer is Sentence B