For an astute low-profile businessman, suddenly being in the limelight for making it to the top of India’s rich list may be a tough situation to handle. But for reticent billionaire Dilip Shanghvi, it’s a good place to be in. Over the years, he has built Sun Pharmaceuticals by carefully choosing lucrative segments and through a string of thoughtful acquisitions. The most recent one, the purchase of homegrown Ranbaxy from Daiichi Sankyo at a time when the company was wilting under regulatory heat, is again a well-timed move to consolidate his generics portfolio.