Choose the reaction with negative ,∆S value

ΔS has negative value if Δng=− ve i.e.  number of gaseous moles decreasing during a reactionFor (a)     Δng=2−0=2For(b)      Δng=2−1=1For(c)   Δng=2−3=−1For(d)       Δng=3−0=3For (e)      Δng=1−0=1