Option a is the correct answer. The temples of Bhubaneswar and Puri in Odisha are examples of the Nagara style of temple architecture, which is prevalent in northern India. The Nagara style is characterized by a curvilinear shikhara or tower over the garbhagriha or sanctum, a square or rectangular plan, and a stone platform with steps leading up to it. The Nagara style has many regional variations, such as the Odisha school, which features a vertical shikhara with a circular top, and a porch or jagamohana with a pyramidal roof. Important Tips Dravidian style: It is characterized by towering entrance gateways known as "gopurams," pyramidal towers housing sanctums, elaborately carved pillars, and the abundant use of granite. Some examples of Dravidian temples are the Brihadeshwara temple in Thanjavur, the Meenakshi temple in Madurai, and the Kailashnath temple in Kanchipuram. Besara/Vesara style: It was flourished in the Deccan part of India. Also called the Hybridised style, it combines features of Nagara and Dravida styles. Chalukya's rulers and Hoysala rulers promoted this style. These temples exhibit a distinctive blend of features, including pyramidal shikharas inspired by the Dravida style, ornate mandapas reminiscent of the Nagara style, and intricate carvings and sculptures that depict mythological tales.