Explanation:

Vittala Temple was built in the 15th century during the rule of Devaraya II, one of the rulers of the Vijayanagara Empire. 

• The temple is dedicated to Vittala and is also called Vijaya Vittala Temple. Vittala is said to be an incarnation of Lord Vishnu.
• Dravidian style adorns the built of the complex, which is further enhanced with elaborate carvings. 
• Dravidian architecture survives in the rest of Southern India spread through the patronage of the Vijayanagara rulers.
• Vijayanagara architecture is also known for its adoption of elements of Indo Islamic Architecture in secular buildings like the Queen’s Bath and the Elephant Stables, representing a highly evolved multi-religious and multi-ethnic society.

Hence only statements 1&2 are correct.