The correct option is Chittorgarh.
Explanation
Chittorgarh Fort is widely cited as the largest fort in India in terms of area.
- Location and Scale: Located in the Chittorgarh district of Rajasthan, the fort is situated on a 180-meter-high hill. It covers an expansive area of approximately 700 acres (2.8 sq km) and has a circumference of roughly 13 kilometers.
- Historical Significance: It served as the capital of the Mewar Kingdom and is a quintessential example of Rajput architecture. It is known for its massive ramparts, towers (such as the Vijay Stambha and Kirti Stambha), and palaces.
- UNESCO Status: In 2013, it was declared a UNESCO World Heritage Site as part of the "Hill Forts of Rajasthan."
Comparison with other options:
- Gwalior Fort: While historically significant and strategically important, its area is smaller than that of Chittorgarh.
- Red Fort: A masterpiece of Mughal architecture in Delhi, it is a large complex but does not match the sheer land area of the Chittorgarh hill fort.
- Daulatabad Fort: Located in Maharashtra, it is famous for its formidable defensive hill structure (Devagiri), but it is not the largest in terms of total area.
Key Takeaway: Chittorgarh Fort is the largest fort in India, covering approximately 700 acres, and is a designated UNESCO World Heritage Site representing Rajput military architecture.