Step 1: Understanding the Mansabdari system.
The Mansabdari system was a military and administrative system introduced by the Mughal emperor Akbar. It was used to determine the rank, pay, and duties of officers, known as "Mansabdars." The system had two important ranks: "Zat" (personal rank) and "Sawar" (cavalrymen or the number of troops a Mansabdar was required to maintain). Akbar introduced these ranks to organize his empire's bureaucracy and military.
Step 2: Analyzing the options.
(A) Humayun: This is incorrect. Humayun did not introduce the Mansabdari system or the ranks of Zat and Sawar.
(B) Akbar: Correct. Akbar introduced the Mansabdari system and established the ranks of Zat and Sawar.
(C) Jahangir: This is incorrect. Jahangir did not introduce the Mansabdari system, though he did continue it.
(D) Aurangzeb: This is incorrect. Aurangzeb inherited the Mansabdari system but did not introduce it.
Step 3: Conclusion.
The rank system of "Zat" and "Sawar" was introduced by Akbar. Therefore, the correct answer is (B) Akbar.