How Many Calcium,titanium,and Oxygen Ions Are There in the Perovskite

Multiple Choice

How many calcium,titanium,and oxygen ions are there in the perovskite unit cell shown below?

A) 1 Ca²⁺,2 Ti⁴⁺,and 3 O^2-
B) 1 Ca²⁺,1 Ti⁴⁺,and 6 O^2-
C) 1 Ca²⁺,4 Ti⁴⁺,and 6 O^2-
D) 1 Ca²⁺,1 Ti⁴⁺,and 3 O^2-
E) 1 Ca²⁺,2 Ti⁴⁺,and 6 O^2-