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I am grateful to all who provided guidance .. thanks!
two more questions :

1. Can i still apply for OWP when i submit a family class application (outside canada but residing in Canada)?
2. Should I inform the immigration officer at the airport that i am going to apply for family sponsorship when i arrive to Canada (i already have a visit visa)?
1) no.
2) only answer the questions posed. Don't offer information that is not requested.
 
I am grateful to all who provided guidance .. thanks!
two more questions :

1. Can i still apply for OWP when i submit a family class application (outside canada but residing in Canada)?
2. Should I inform the immigration officer at the airport that i am going to apply for family sponsorship when i arrive to Canada (i already have a visit visa)?
1. Multiple replies on that. No OWP available for outland application.
Looks like you intent to travel during the application.
So do not lied and apply in-land just so that you can get the OWP. Your whole application (if applied in-land) could be cancelled if you are denial entry to Canada. And it's possible even with a valid visit visa.

2. Not necessary.