Which one of the following is the only inscription in which the names of Chandragupta Maurya and Ashoka are mentioned together?

The names of both Ashoka and Chandragupta are mentioned in the Junagarh inscription of Rudradaman. Information about Sudarshan Lake is obtained from this record. Sudarshan Lake was located in Girnar (Junagarh) of Saurashtra province, and the Junagarh inscription mentions the name of Chandragupta Maurya as the creator of this lake, while canals were made from this lake for irrigation development during the time of Ashoka. The name of Rudradaman himself and Gupta ruler Skandagupta are also found in this record related to Sudarshan Lake.