In the interbank market, the standard size of a trade among large banks in the major currencies is

Question $21$ options:

for the U$.$S$.-$dollar equivalent of $$1,000.$

for the U$.$S$.-$dollar equivalent of $$10,000,000.$

for the U$.$S$.-$dollar equivalent of $$100,000.$

for the U$.$S$.-$dollar equivalent of $$10,000,000,000.$