Hello Vijay,
very good observation you are developing a taste for details!
the P-bit is the NP bit in your capture the meaning changes when the options are within an LSA type 7.
see
http://www.ietf.org/rfc/rfc3101.txt
Appendix A: The Options Field
the meaning is N bit = NSSA area when the options field is in an hello packet, it is a P bit in the options field of an LSA type 7.
N-bit: The N-bit describes the router's NSSA capability. The N-
bit is used only in Hello packets and ensures that all
members of an NSSA agree on that area's configuration.
When the N-bit is set in the Hello packet that is sent out
a particular interface, it means that the router will send
and receive Type-7 LSAs on that interface. Two routers
will not form an adjacency unless they agree on the state
of the N-bit. If the N-bit is set in the options field,
the E-bit must be clear.
P-bit: The P-bit is used only in the Type-7 LSA header. It flags
the NSSA border router to translate the Type-7 LSA into a
Type-5 LSA. The default setting for the P-bit is clear.
if the P bit is set translation occurs at ABR at area border.
note: if two ABRs for the NSSA area exist only one (the one with highest OSPF RID , the common choice ) performs the translation but both generate LSA type 3 for the forwarding address
Hope to help
Giuseppe
