Which reaction has the greatest increase in entropy?

A.     ${{\text{C}}_3}{{\text{H}}_8}{\text{(g)}} + {\text{5}}{{\text{O}}_2}{\text{(g)}} \to {\text{3C}}{{\text{O}}_2}{\text{(g)}} + {\text{4}}{{\text{H}}_2}{\text{O(g)}}$

B.     ${{\text{H}}_2}{\text{(g)}} + {\text{C}}{{\text{l}}_2}{\text{(g)}} \to {\text{2HCl(g)}}$

C.     ${{\text{N}}_2}{\text{(g)}} + {\text{3}}{{\text{H}}_2}{\text{(g)}} \to {\text{2N}}{{\text{H}}_3}{\text{(g)}}$

D.     ${{\text{C}}_2}{{\text{H}}_4}{\text{(g)}} + {{\text{H}}_2}{\text{(g)}} \to {{\text{C}}_2}{{\text{H}}_6}{\text{(g)}}$

A