There is an art to sitting on a throne. Adar Poonawalla, 36, started working for the Serum Institute of India, the vaccine and drug manufacturing empire of his father Cyrus, at 20. Now, he has also built up a magnificent European art collection. But this is no idle grabber of expensive canvases—his Rs 100 crore clean city initiative in Pune was lauded by the PM. Fittingly, he is now a Swachh Bharat ambassador. That’s a squeaky clean profile!