The correct option is B Mathura
Guptas stone sculptural art was related with Mathura School of Art. The material used in this school was the spotted red stone. This art reached its peak during the Gupta period in 6th or 7th century. The Mathura School images include those of Buddha , Bodhisattvas , Vishnu , Shiva , Yakshas , Yakshinis , Jinas etc.