Explanation:

1581 (Correct): Emperor Akbar introduced Din-i Ilahi, often translated as "Divine Faith," in 1582 (though some sources cite 1581 as the year of its conception or initial discussions). It was a syncretic religious doctrine intended to merge the best elements of the religions of his empire, primarily an ethical system rather than a religion with dogmas. Its introduction was a culmination of his intellectual discussions in the Ibadat Khana. 1576: This year saw the Battle of Haldighati; the formal introduction of Din-i Ilahi occurred later. 1572: This year marked Akbar's conquest of Gujarat; his religious policies were still evolving. 1569: This year is notable for the birth of Prince Salim and the beginning of Fatehpur Sikri's construction; Din-i Ilahi was still several years away.