Final answer:
To find the maximum number of Claritin D 12 tablets that can be sold in a single transaction with a PSE content limit of 3,600 mg, divide the limit by the PSE content of one tablet (120 mg) to get 30 tablets as the answer.
Step-by-step explanation:
To determine the maximum number of Claritin D 12 tablets that can be sold in a single transaction, knowing that each tablet contains 120 mg of Pseudoephedrine (PSE) and the limit per transaction is 3,600 mg of PSE, we simply divide the total allowed amount of PSE by the amount of PSE in one tablet.
Maximum number of tablets = Total allowed amount of PSE per transaction / Amount of PSE in one tablet
= 3,600 mg / 120 mg per tablet
= 30 tablets
Therefore, the maximum number of Claritin D 12 tablets that could be sold in a single transaction is 30 tablets (Option C).