New Delhi, May 5 -- I know these two brothers who are now US citizens, but their biscuit of choice remains Parle-G, which they grew up eating. Yes, the same biscuit that moms dissolve in a glass of warm milk as enticement when their child is being difficult. Parle-G will be 100 in a decade or so, and there is something about snacking on a piece of history which has remained true to its crunch. In Britain, McVitie's Chocolate Digestive has turned 100, and now we are told that the right way to eat it is with the chocolate side down. I had to put this theory to test. But in our sweltering weather, the chocolate smears your fingers, more so when you are holding the dark side down. I had to put the biscuits in the fridge first to firm up the c...