Hra exemption query for a practicing doctor in government se

Respected sir/madam
in lieu of the new income tax rule of 2013 that it becomes mandatory for a person to disclose the PAN number of his/her landlord if he /she is claiming having actual rent paid in excess of 1,00,000 rupees.
I have a query in this regard-
If i claim a house rent paid of 8300 per month amounting to a total rent paid per annum of -99600
my basic  -46100
my DA-   51863

my HRA -28813
First question is whether NPA will also be added to the DA as I am a doctor in a government hospital?
If not can any one provide me a link with the actual site of income tax from where I can take a print out of the order.
If I claim the above mentioned rent paid
then for exemption being asked under HRA from total salary would be calculated by which formula?
if by -actual rent paid - 10 % of (basic+DA) then by this formula in my case the amount comes out to be in negative ?
can there be such a case where the HRA exemption can be negative. please help me in my case.
I would like an answer to my query as early as possible.
thank you(I have attached my november pay slip also here)
Dr.Anshuman Singh
9540946870