The correct option is 2 and 3 only.
Explanation
The temples of Odisha represent a distinct regional sub-style of the Nagara order, commonly referred to as the Kalinga School of Architecture. This style flourished primarily between the 8th and 13th centuries A.D.
Statement 1 is Incorrect.
The ground plan of the main temple in the Odisha style is generally square. While the exterior walls often feature projections (known as rathas or pagas) that give the structure a cruciform or star-like appearance, the fundamental plan remains square. Circular ground plans are extremely rare and are typically associated with specific Tantric temples, such as the Chausath Yogini temples, rather than the standard Kalinga temple architecture.
Statement 2 is Correct.
A hallmark of the Odisha temple style is the stark contrast between the exterior and the interior. The exterior walls are lavishly carved with intricate sculptures, floral motifs, and geometric patterns. In contrast, the interior of the sanctum is usually plain and bare, intended to focus the devotee's attention solely on the deity.
Statement 3 is Correct.
The main tower, or Rekha Deula, rises vertically and then curves inward sharply at the top. While the body of the temple is square, the crowning area, known as the Mastaka, transitions into a circular form. This area includes the Beki (neck), the Amalaka (a large, fluted circular disc), and the Kalasha (finial), which are circular in cross-section.
Key Takeaway:
The Kalinga School of Architecture is characterized by a square ground plan, a curvilinear tower (Rekha Deula), and a distinct stylistic preference for profusely decorated exteriors paired with unadorned interiors.