Repo Market means (a) A money market instrument which helps in collateral short term borrowing and lending through sale and purchase operation in debt instrument (b) A money market instrument which helps in collateral long term borrowing and lending through sale and purchase operation in debt instrument (c) A money market instrument which helps in collateral short term lending through sale and purchase operation in debt instrument (d) A money market instrument which helps in collateral short term borrowing through sale and purchase operation in debt instrument