TWO GPA

"A" gives notarized GPA to "B" for litigation in 2007. Later "A" gives registered GPA to "C" for the same purpose in 2008, but did not cancel earlier GPA. Later "B" file a suit on behalf of "A" against "C". Now "A" is with "C".

What must be the result of the suit filed by "B" against "C". Whether "b" can take advantage of non revocation of earlier GPA. There are property disputes.