Propane $(C_3{H}_8)$ reacts with oxygen to produce carbon dioxide and water vapour.

When this reaction is balanced, the mole ratio is

$1$:$10$:$3$:$4$

$2$:$10$:$6$:$8$

$1$:$5$:$3$:$4$

$2$:$5$:$6$:$8$