Q. Under which Chola ruler was the Bay of Bengal famously referred to as the 'Chola Lake' due to the total naval supremacy of the dynasty?
Answer: Rajendra Chola I
Notes: Rajendra Chola I, son of Rajaraja I, completed the conquest of Sri Lanka and led a bold naval expedition across the Bay of Bengal, defeating the Srivijaya Empire. This established Chola supremacy over sea trade routes to China, leading to the Bay of Bengal being known as the 'Chola Lake'.