How Many Titanium and Oxygen Ions Are There in the Rutile

How many titanium and oxygen ions are there in the rutile unit cell shown below?

A) 3 Ti⁴⁺ and 4 O^{2 -}
B) 3 Ti⁴⁺ and 6 O^{2 -}
C) 2 Ti⁴⁺ and 4 O^{2 -}
D) 2 Ti⁴⁺ and 3 O^{2 -}
E) 2 Ti⁴⁺ and 6 O^{2 -}