The greatness of Sher Shah lies in his administrative reforms. This means that his most notable achievements and contributions were in the area of governance and administrative practices. Option 1, victories against Humayun, refers to military successes against the Mughal emperor, but this does not encompass Sher Shah`s overall greatness or impact. Option 2, superior generalship, implies his skill as a military leader, which may have contributed to his successes but does not capture his overall achievements. Option 4, religious tolerance, is unrelated to Sher Shah`s accomplishments and does not align with historical records. Therefore, the answer provided, option 3, is correct. It indicates that Sher Shah`s administrative reforms were his most significant contribution to history.