Correct Answer:
A. Fatehpur Sikri
The correct answer is Fatehpur Sikri. Emperor Akbar initiated his syncretic religion, Deen-e-Ilahi, in 1582 from Fatehpur Sikri, which served as his capital at the time. The Ibadat Khana (House of Worship) in Fatehpur Sikri was the venue for discussions among various religious scholars that led to the formulation of Deen-e-Ilahi.
- Lahore, Agra, and Delhi were all important Mughal cities and capitals at different times, but Fatehpur Sikri was the specific location where Deen-e-Ilahi was formally introduced and promulgated by Akbar.