The university which became famous in the post-Gupta Era was

Answer: Option C

The post-Gupta period saw a long succession of kings who continued building at Nalanda "using all the skill of the sculptor". At some point, a "king of central India" built a high wall along with a gate around the now numerous edifices in the complex. Another monarch (possibly of the Maukhari dynasty) named Purnavarman who is described as "the last of the race of Ashoka-raja", erected an 80 ft (24 m) high copper image of Buddha to cover which he also constructed a pavilion of six stages.