Question

What is acid and base used in Na3PO4

Answer 1

Your question makes no sense. Do you mean which acid and base are used to make Na3PO4? If so
NaOH + H3PO4 ==> Na3PO4 + H2O
The balanced equation is
3NaOH + H3PO4 ==> Na3PO4 + 3H2O