Step 1: Understanding the Concept.
SDR stands for Special Drawing Rights, an international reserve asset created by the IMF. It is not an actual currency issued by any single country; instead, its value is based on a basket of major currencies, which is why it is called an “artificial” or synthetic currency.
Step 2: Check options A, B, and C.
ADR (American Depositary Receipt) and GDR (Global Depositary Receipt) are certificates that represent shares of a foreign company traded on a stock exchange. They are financial instruments for raising equity capital, not currencies at all, so options A, B, and C are wrong.
Step 3: Final Answer.
SDR is the artificial currency here, so option D is correct.