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-