A mineral is made of calcium ,titanium and oxygen `Ca^(2+)` ions located at corners ,`Ti^(4+)` ions at the body -centre and `O^(2-)` ions face -centred of the unit cell. The molecular formula of the mineral is :
A. `CaTi_(3)O_(4)`
B. `CaTiO_(3)`
C. `CaTiO_(2)`
D. `CaTi_(2)O_(3)`