search - Seo, pagerank - query in url -

i have question pagerank.

i want know, if google counting different pagerank these urls, or if query presence in url never mind , pagerank of these url counted 1 "site.com/dir/":

a) site.com/dir/ b) site.com/dir/?q=875445 c) site.com/dir/?q=adssda 

or

a) site.com/dir/index.php b) site.com/dir/index.php?q=875445 c) site.com/dir/index.php?q=adssda 

thank you

google gives ranks pages e.g

a) site.com/dir/ b) site.com/dir/?q=875445 c) site.com/dir/?q=adssda  = page, b = different page, c = different page 

if want check ranks pages on go

you can download extension google chrome called seoquake lets see kinds of stuff current page looking at.

so doesn't matter how pages url like,if it's different page it's different page e.g different page rank