Balance the following reaction:

a $C_3{H}_6(g)+b_O{?}_2(g)cC{O}_2(g)+d{H}_{2}O(g)$

$a=1,b=3,c=2,d=2$

$a=1,b=4,c=3,d=3$

$a=2,b=9,c=6,d=6$

$a=3,b=9,c=6,d=6$