Which one of the following is a money market instrument?

Treasury bill

The correct answer is option 4- Treasury bill.

Treasury bill is a money market instrument while the others are capital market instruments.

A Treasury bill is basically an instrument of short-term borrowing by the Government of India maturing in less than one year. They are also known as Zero Coupon Bonds issued by the Reserve Bank of India on behalf of the Central Government to meet its short-term requirement of funds. Treasury bills are issued in the form of a promissory note. They are highly liquid and have assured yield and negligible risk of default. They are issued at a price which is lower than their face value and repaid at par. The difference between the price at which the treasury bills are issued and their redemption value is the interest receivable on them and is called discount. Treasury bills are available for a minimum amount of ₹25,000 and in multiples thereof.