Thanks for your kind words Zareef. They actually sent it from Canada on 2nd Oct'14 but somehow it took time to reach in India. May be due to general mail thing. I still have time to re-submit it as the requirement they have asked is very simple. For DOB verification, they have asked for Secondary School record which should indicate Name, DOB and either Parents' name on it.
But again this forum has come as great help, as someone pointed that CIC uses the standard Template to return your application, however highlights whats they require.
Thanks once again.