Puja,
The details of the
PIO can be located between pages 68 and 78 of the following manual:
http://www.mumbaipolice.org/right_of_information/CP.pdf
Please also remember that your
RTI application to the RPO has to be under
RTI Rules for the Centre
while your
RTI application to the D N Nagar Police station will have to be under
RTI Rules for Maharashtra, which are available as a attachment to the following post:
http://www.rtiindia.org/forum/2370-n....html#post8213