12. Consider the following statements: (UPSC / IAS 2019)
1) In the revenue administration of Delhi Sultanate, the in-charge of revenue collection was known as ‘Amil’.
2) The Iqta system of Sultans of Delhi was an ancient indigenous institution.
3) The office of Mir Bakshi came into existence during the reign of Khalji Sultans of Delhi.
Which of the statements given above is/are correct?