Find the number or acids which have tetrahedral shape w.r.t. central atom.

${\mathrm{H}}_3{\mathrm{PO}}_4,{\mathrm{H}}_2{\mathrm{SO}}_4,{\mathrm{H}}_3{\mathrm{PO}}_3,{\mathrm{H}}_3{\mathrm{PO}}_2,{\mathrm{H}}_3{\mathrm{BO}}_3,{\mathrm{HClO}}_4$

${\mathrm{HClO}}_3,{\mathrm{H}}_2{\mathrm{CO}}_3$

When a molecule's core atom has four bonds and no lone pairs, the molecule is said to be tetrahedral. The acids which have tetrahedral shape w.r.t. central atom are,

${\mathrm{H}}_3{\mathrm{PO}}_4,{\mathrm{H}}_2{\mathrm{SO}}_4,{\mathrm{H}}_3{\mathrm{PO}}_3,{\mathrm{H}}_3{\mathrm{PO}}_2,{\mathrm{HClO}}_4$