Igidr application 2016

[Dport]

Igidr registartions have started from 25/02/2016.  
I have a doubt. In the category section, there is no option for OBC.  
What can be done in this case. can some help me in this regard.  Are there any helpline other than" [e-mail]" available. I mailed then regarding this issue but they haven't replied.   So, it is my request those who are studying in IGIDR or are passouts from there  for help.