Explanation:

Temple Architecture of Hoysala

• The architecture of the Hoysalas is a hybrid of the nagara style of temple architecture of north India and the dravidian style from the South. 
• The temples were built on platforms and had a star shaped plan.
• A navaranga was usually included as a place for people to gather and participate in cultural programs such as music and dance performances, story-telling from mythology, and religious discourses. 
• Visual elements such as a gently curving bell shaped chajja, and lathe turned stone pillars with circular rings carved on them are typical stylistic elements of Hoysala architecture. 
• Rich sculptural decoration is a mark of the highest artistic achievement of the Hoysalas. 
• The exterior walls of the numerous temples were intricately decorated with stone sculptures and carving. 

These sculptures are rich with religious and cultural iconography depicting gods and goddesses, wars and victories, dance and music, hunting, games, processions, and the dress, jewelry, and daily life of people and scenes from the Ramayana, Mahabharata, and the Bhagavatham. 

• The temples were built of a soft chlorite-schist stone quarried nearby that was especially soft when first quarried and hardened on contact with air. 
• Other smaller temples, shrines, and mantapa dot the town. Mantapa that are pavilions or pillared halls of all sizes are a typical feature and occurred with temples and without.

In addition to supporting both Shaivite and Vaishnavite sects of Hinduism, the Hoysala rulers gave court recognition and status to Jainism, a religion that prescribes a path of non-violence and self-control as paths to spiritual liberation and emphasizes the equality of all beings.

Hence only statements 1&2 are correct.