Kotak Mahindra Bank's CEO Uday Kotak said it is a "proud moment for India to pip UK, our colonial ruler" to become the world's fifth largest economy. "But a reality check of population denominator: India: 1.4 bn vs UK: 0.068 bn. Hence, per capita GDP we [are] at $2,500 vs $47,000. We've miles to go," Kotak wrote in a tweet.