It happens only in DCE..

DCE mein ab kya kya hua – kaise bataaya jaaye – there’s nowhere to start from – nowhere to finish either – hence what I’ll do is roughly talk in terms of years of graduation – 1^st year to start with, then combining 2^nd and 3^rd years (quite difficult to distinguish them in memory), and then finally 4^th year. There will be a section post DCE as well, but there’s still some time for that.