a Bronsted-Lowry base can accept a H+ whereas a Bronsted-Lowry acid can donate H+. Thus, (D) PO4^3- can accept H+ whereas it can\'t donate H+. So, it is a Bronsted-Lowry base. Solution a Bronsted-Lowry base can accept a H+ whereas a Bronsted-Lowry acid can donate H+. Thus, (D) PO4^3- can accept H+ whereas it can\'t donate H+. So, it is a Bronsted-Lowry base..