Answer : 4. "प्रतिहार"
Explanation :

1. Mahamaru style developed mainly in Marudesh, Sapadalaksha, Surasena and parts of Uparmal.

2. The patrons of the Mahamaru temple construction architectural style are Gurjara-Pratihar.

3. This style was very popular in Rajasthan from 8th to 12th century, obscene statues have also been made in it.

Example- Harshnath Temple (Sikar), Kiradu Temple (Barmer)