The correct option is 2 only
Explanation
The Nagara style of temple architecture developed in Northern India (from the 5th century AD onwards). It is structurally distinct from the Dravida style of Southern India, particularly in terms of the boundary, tower shape, and ground plan.
Statement-wise Analysis:
- Statement 1 is Incorrect: The entire temple in the Nagara style is generally built on a high stone platform known as the Jagati, which is accessible by steps. This is a defining feature that elevates the temple structure above the surrounding ground.
- Statement 2 is Correct: Elaborate boundary walls and monumental gateways (Gopurams) are characteristic features of the Dravida style (South Indian). Nagara temples typically do not have elaborate boundary walls or gateways; the temple stands freely on its platform.
- Statement 3 is Incorrect: The Garbhagriha (sanctum sanctorum) is always located directly under the main and tallest tower, known as the Shikhara. The Mandapa (assembly hall) is located in front of the Garbhagriha and usually has a lower, distinct roof. Placing the sanctum under the Mandapa would violate the architectural logic of the style.
Key Takeaway: The Nagara style is characterized by a raised platform (Jagati) and a curvilinear tower (Shikhara) situated directly over the sanctum, unlike the Dravida style which features boundary walls and Gopurams.