Is the #4 in the following is true?
http://www.immihelp.com/immigrant-vi...-marriage.html
If yes, is it specific only to EB ?
Yes
Is the #4 in the following is true?
http://www.immihelp.com/immigrant-vi...-marriage.html
Partly yes. Some family based categories are negatively affected if the immigrant visa holder gets married before using that visa.
If yes, is it specific only to EB ?
Marriage afetr i-155 stamp but BEFORE PoE