Concept:
Foreign exchange reserves are the foreign currency, gold and other reserve assets a country's central bank holds to settle international payments and stabilise its own currency, and country rankings on this measure change from year to year depending on trade surpluses and central bank policy.
Explanation:
Around the period this exam was held, China held by far the largest foreign exchange reserves in the world, well over three trillion US dollars, built up through years of trade surplus. Russia's reserves, built mainly from energy exports, were next among these four countries, running into several hundred billion dollars. India's reserves at the time were smaller than Russia's, in the range of a few hundred billion dollars, reflecting a developing economy with a narrower trade surplus. France, being a Eurozone country whose reserve management is largely pooled through the European Central Bank system, held comparatively modest national foreign exchange reserves, the smallest among the four. This rules out the other three sequences, since each places France, China, Russia or India out of this order.
Final Answer:
The correct high-to-low order of foreign exchange reserves among these four countries is China, Russia, India, France.