What are the relationship between household and commercial bank

All commercial banks must keep an account with the Central Bank. These balances are used for cheque clearing purposes between banks.  Payments for cheques between banks are set off at the Central Bank’s clearing house. The Central Bank can also demand commercial banks to deposit a certain percentage of their total deposits with the central bank in order to control the money supply.

The Central Bank is a lender of last resort and will aid commercial banks when needed. The Central Bank dictates the interest rate that commercial banks can offer by setting the bank rate. This is the interest rate set by the Central Bank and the rate at which commercial banks and the Central Bank do business, e.g. loans offered by the Central Bank to commercial bank.

the answer is "b.the increased supply will create a surplus. "

the essential thought behind price controls is straightforward - utilize the power of law to modify the equilibrium of a market. for instance, the legislature may choose that the steel business needs to survive, and in this way pass a law to set a value floor on steel. this implies all steel sold must offer at or over the floor value, which must be set over the equilibrium cost for it to have any impact. the switch could likewise happen - the administration can choose that steel is excessively costly and set a value roof underneath its equilibrium value, with the goal that all steel must be sold at or beneath that ceiling.