Bengaluru, Jan. 14 -- Flipkart co-founder Sachin Bansal has invested $100 million in India's largest cab-hailing platform Ola and is expected to invest more, as Ola founder Bhavish Aggarwal aims to diversify the company's investor base amid a boardroom battle with its biggest backer, SoftBank Group Corp. This is Bansal's first major investment after he sold his stake in Flipkart for nearly $1 billion following his ouster from the online retailer after Walmart bought a controlling stake in May....