Solve this
Q. Select the correct statement(s) for $(N{H}_4{)}_{3}P{O}_4$.
(A) Ratio of number of oxygen atom to number of hydrogen atom is 1 : 3.
(B) Ratio of number of cation to number of anion is 3 : 1.
(C) Ratio of number of nitrogen atom to number of oxygen atom is 3 : 4.
(D) Total number of atoms in one mole of $(N{H}_4{)}_{3}P{O}_4$ is 20.