I have done changes as per James sir instructions but changes are not saving permanently.
Your first post described the steps to bout into a specific runlevel as a one time thing with one error I corrected.
I suggest you rewind a moment and state clearly what your requirements are - what are you trying to achieve?
If it is to change the default runlevel then amend /etc/inittab
If you want the removal of rhgb and quiet from the kernel arguments to persist then amend the grub configuration in the system.