The correct option is 2 and 3 only.
Explanation
The Jain temples at Mount Abu, collectively known as the Dilwara Temples, are the zenith of the Solanki style (also called Maru-Gurjara style) of temple architecture. This style flourished in Gujarat and Rajasthan between the 11th and 13th centuries.
1. Statement 1 is Incorrect: The Dilwara temples were not constructed by the Pala rulers of Bengal. They were built by powerful ministers and merchants, such as Vimal Shah and the brothers Vastupala and Tejapala, under the patronage of the Solanki (Chalukya) rulers of Gujarat. The Pala dynasty ruled in Eastern India (Bengal and Bihar) and is primarily associated with Buddhist architecture (e.g., Somapura Mahavihara).
2. Statement 2 is Correct: A defining characteristic of the Dilwara temples is the stark contrast between their architecture and interiors. They feature simplistic, plain exteriors (often to avoid attracting the attention of invaders) but possess exuberantly carved marble interiors that are among the finest in India.
3. Statement 3 is Correct: The interiors are renowned for their intricate craftsmanship. The domed ceilings are particularly famous for their concentric layers of carving, a central pendant, and graceful bracket figures (often depicting vidyadevis or celestial nymphs) that adorn the pillars and architraves.
Key Takeaway: The Dilwara Temples (Mount Abu) represent the Solanki style of Western India, characterized by the use of white marble, plain exteriors, and highly ornate interiors with intricate ceiling carvings.