Which of the following forts was not constructed in the reign of Akbar?

The correct answer is A. The Red Fort of Delhi was not built by Akbar. Shah Jahan constructed it between 1639 and 1648 when he shifted his capital to the new city of Shahjahanabad, and it was originally called Qila-i-Mubarak.

Why the others are wrong:

• Agra Fort (B): Akbar began it in 1565 and completed the main structure around 1573. Its red sandstone walls and the Jahangiri Mahal inside are its well-known features.
• Allahabad Fort (C): Akbar built it in 1583 at the confluence of the Ganga and Yamuna, and he named the city Ilahabas.
• Lahore Fort (D): Akbar rebuilt it largely in brick between 1566 and 1584, so it is an Akbari fort even though the site has older origins.

The core concept is Mughal military architecture as a political statement. Forts marked imperial control over strategic river and trade routes. For Mains, this links to how these structures shaped administration and urban planning under the Mughals.

Trap: Candidates see 'Red Fort' and 'Agra' and assume both belong to the same ruler or period. Akbar's great fort is at Agra, while the Red Fort is Shah Jahan's creation.