Detailed Solution:
The correct answer is “Revenue from Iqta was directly deposited in Sultan's account”.
1) The Iqta system was a land revenue system where the Sultan granted specific areas of land (Iqtas) to military officers or nobles in exchange for their services.
2) The Siyasatnama, a book written by Nizam al-Mulk, provided valuable insights into the administration of the Iqta system.
3) The revenue collected from the Iqta (land grants) was not directly deposited into the Sultan's account. Instead, it was generally managed by the Muqtis (officials in charge of Iqta), who used it to maintain troops and manage their administrative responsibilities.
4) The Muqti, the holder of an Iqta, was expected to use a portion of the revenue collected to maintain a military force.