The number of \( \mathrm{P-O-P} \) bonds in \( \mathrm{H_4P_2O_7} \), \( \mathrm{(HPO_3)_3} \) and \( \mathrm{P_4O_{10}} \) are respectively
\( 0, 3, 4 \)
\( 1, 3, 6 \)
\( 1, 2, 4 \)
\( 0, 3, 6 \)