Explanation:

Justification: A Government Security (G-Sec) is a tradable instrument issued by the Central Government or the State Governments. It acknowledges the Government’s debt obligation. Such securities are short term (usually called treasury bills, with original maturities of less than one year) or long term (usually called Government bonds or dated securities with original maturity of one year or more).
S1: G-Secs are issued through auctions conducted by RBI.
Floatation of State Government Loans (State Development Loans): As per the Reserve Bank of India Act, 1934, the RBI may, by agreement with any State Government undertake the management of the public debt of that State. I
Accordingly, the RBI has entered into agreements with 29 State Governments and one Union Territory (UT of Puducherry) for management of their public debt.
S2: In India, the Central Government issues both, treasury bills and bonds or dated securities while the State Governments issue only bonds or dated securities, which are called the State Development Loans (SDLs). Treasury Bills (T-bills) Treasury bills or T-bills, which are money market instruments, are short term debt instruments issued by the Government of India and are presently issued in three tenors, namely, 91 day, 182 day and 3.64 day.
S3: Treasury bills are zero coupon securities and pay no interest. They are issued at a discount and redeemed at the face value at maturity.
For example, a 91 day Treasury bill of 100/- (face value) may be issued at say 98.20, that is, at a discount of say, 1.80 and would be redeemed at the face value of 100/-.