What is the height of world Tallest building "Taipei 101, Taipei Taiwan " ?

What is the height of world Tallest building "Taipei 101, Taipei Taiwan " ?

A. 709(m) 1,670 (Ft)
B. 509(m) 1,670 (Ft)
C. 809(m) 1,670 (Ft)
D. None of These

Answer : B