Which of the following statement(s) is/are found to be correct? I. The Ganga River System is India's largest which includes approximately 25 per cent of the nation's area, and is bounded by the Himalayas in the north and the Vindhya Range to the south. II. The Ganga has its source in the glaciers of the Greater Himalayas that form the frontier between India and Tibet in north-western Uttaranchal. III. The Ganga originates as the Bhagirathi from the Gangotri Glacier and flows southeast through the plains of northern India, fed by the Alaknanda and the Yamuna among other tributaries.