Which prescription label corresponds with the instruction: 1 tsp qid pc prn allergy?

The prescription instruction "1 tsp qid pc prn allergy" translates to taking one teaspoon four times a day (qid stands for "quater in die," meaning four times a day), after meals (pc stands for "post cibum," meaning after meals), and as needed for allergies (prn indicates "pro re nata," or as needed).

This means the patient should take the medication specifically when they are experiencing allergy symptoms, and it's intended to be administered not at scheduled intervals, but only when necessary within the context of their allergic condition. Therefore, the correct interpretation of the dosage and frequency in the provided options matches perfectly with the prescribed instruction.