Better to 2 tickets from Bombay to Delhi & Delhi to Jammu. Chance are maximum.
There is only 1 issue. Does railway skips the WL if sectors are not available? This is GNWL. So I have ticket from Mathura to Jammu with WL315 but seats will get vacant from Delhi so this PNR will be skipped and next PNR from Delhi will get confirmation? Admins & Mods, please comment.