Lal, I was being curious where you got this from (nirodha samapatti = parinibbana)
In this post Nirōdha Samāpatti, Phala Samāpatti, Jhāna, and Jhāna Samāpatti you stated:
Nirōdha samāpatti is succinctly described in a verse in the Mahāvedalla Sutta (MN 43), where the difference between a dead body and the body of one in nirōdha samāpatti is described
So my question to you is: Do you think Nirodha samapatti is just like parinibbana because of this sutta: Mahāvedalla Sutta (MN 43), and do you think that is so because nirodha samapatti is being closely related to a dead body (no sankhara), or did you get this from another source?