@sscheema
I am assuming this must have been for the delhi attempt . Try and visit the WPC office in Ghitorni and ask them directly what " HNR " is and why its not mentioned on the list of codes...
These are the timings for public visit
Wednesday 1030 HRS to 1230 HRS
Fridays 1500 HRS to 1700 HRS
@learningtofly
You can give the exam at any centre but you can only renew it from the Delhi Ghitorni office