किस मौर्य शासक को पारंपरिक रूप से अपने साम्राज्य में एक सुव्यवस्थित, व्यापक गुप्तचर प्रणाली (जासूसी प्रणाली) की स्थापना का श्रेय दिया जाता है?

Which of the following were major provincial political centres of the Mauryan Empire mentioned in Ashokan inscriptions?

Sudarshana Lake in Junagadh, Gujarat was originally constructed during the reign of Chandragupta Maurya by his local governor named: