At 61, Tarun Das is just the right age to head a company. A company which is one of the countrys most venerable, biggest in the field, and a part of Indias oldest business house, the Tatas. Is he also the right person? It could have been mere coincidence that Das was chosen to become the non-executive chairman of cement giant ACC, which too was formed about 61 years ago by amalgamating 10 companies. But when chairman Shapoorji Pallonji Mistry decided to step down after a 48-year association and suggested a non-corporate name in his stead, what exactly was he thinking?