Here come secret how this ticket confirmed. There is one permanant BX1 with this train. It was der on Sept 21 in 12962. Coming to how it confirmed... I reaxhed my seat only to know that someone else has exactly three seats which I am claiming. ... His ticket mentioned same three berths as mine.... On checking his PNR I realised that he is lucky fellow to get upgraded to 3AC BX1 ... and i being lucky to get berth.. he thanked me and left