Explanation:

The interbank call money market is a short term money market which allows large financial institutions such as banks, mutual funds and corporations to borrow and lend money at interbank rates, the rate of interest that banks charge when they borrow funds from each other. 
Call money market is that part of national money market where day-to-day surplus funds mostly of banks are traded in . The loans made in this market are of a short term nature their maturity varying between one day to fortnight.