The approximate composition of soda glass is :

Options

A. `SiO_2 75%, Na_2O 15%,CaO 8%,Al_2O_3 2%`
B. `SiO_2 45%,Na_2O 4%,CaO 3%,K_2O 4%,PbO 44%`
C. `SiO_2 80%,Na_2O 4%,CaO 0.5%,K_2O 0.5%,B_2O_3 12%,Al_2O_3 3%`
D. None of the above

Answer

A