17. The correct answer is (b) buy. This is because if the Fed
wants to increase its money supply, it should buy back the treasury
securities from the commercial banks so that they create more money
in the economy and increase the money supply.
18. The given statement is false. When the government wants to
change the money supply, it buys or sells government securities on
behalf of the government.
19. The correct answer is (a). Federal reserve is the federal
government's banks, the central bank and banker's bank in the
United States. This is because Federal Reserve is the Central bank
in the United States. Commercial banks can park their surplus funds
with Fed and also borrow from it. Thus, it is also bankers' bank.
Fed also acts on behalf of the government when it sells or buys in
Open Market operations.
20. The given statement is true. The growth of money supply will
raise the output in the short run leading to real growth rate.
However, in the long run, increase in money supply just causes
inflation.