Concept:Sudarshan Lake was originally constructed under the order of the Mauryan emperor Chandragupta Maurya.Explanation:Sudarshan Lake is located in Saurashtra near Girnar hill. It was built by Chandragupta Maurya through his governor Pushyagupta Vaishya. Later rulers like Ashoka, Rudradaman, and Skandagupta rebuilt or repaired the lake, but the original construction is credited to Chandragupta Maurya.Answer:D. Chandragupta