The Combustion of Butane (C₄H₁₀) Forms Carbon Dioxide and Water $\frac{13} {2}$

The combustion of butane (C₄H₁₀) forms carbon dioxide and water.What is the stoichiometric coefficient for oxygen in the balanced equation when 1 mol of butane undergoes combustion?

A) 9

B) 13

C) $\frac{13} {2}$

D) $\frac{9} {2}$

E) 5