Global e-commerce behemoth Amazon has led a US$12 million funding round for Acko, a digital insurance startup in India. Amazon led the financing in the round that included Ashish Dhawan, founder of private-equity firm ChrysCapital, and Catamaran Ventures, an existing Acko investor, according to TechCrunch. Catamaran Ventures is the personal investment arm of NR Narayana Murthy, who co-founded the Indian…