By Ayushi Agarwal Ahead of India's G20 Presidency which is set to begin on December 1, US Treasury Secretary, Janet Yellen on Friday said that New Delhi is a "natural ally" and stressed that India's G20 year is a chance to accelerate global coordination on debt restructuring. Highlighting the growth in US-India economic ties, she said, "The US and India are 'natural allies,' in the words of a former Indian prime minister. We may be located across the world from each other, but what unites us is far greater than any of our differences. Our fights for independence were born…