If formula of muscovite (white mica) is ${\mathrm{KAl}}_2(\mathrm{OH}{)}_2{\mathrm{Si}}_3{\mathrm{AlO}}_{10}$and if formula of pyrophyllite is ${\mathrm{Al}}_2(\mathrm{OH}{)}_2{\mathrm{Si}}_4{\mathrm{O}}_{10}$ then, select the correct statement.

Mica is formed when one quarter of the ${\mathrm{Si}}^{\mathrm{IV}}$ in pyrophyllite are replaced by ${\mathrm{Al}}^{+3}$ and the, resulting negative charge is balanced by K.

Mica is formed when one third of the ${\mathrm{Si}}^{\mathrm{IV}}$ in pyrophyllite are replaced by ${\mathrm{Al}}^{+3}$ and the resulting negative charge is balanced by K.

None of the above

Mica is formed when half of the ${\mathrm{Si}}^{IV}$ in pyrophyllite are replaced by ${\mathrm{Al}}^{+3}$ and the resulting negative charge is balanced by K.