For which one of the following reactions, the graph of $∆$G against T is almost horizontal to temperature axis

$∆\mathrm{G}=∆\mathrm{H}-\mathrm{T}∆\mathrm{S}$

$∆\mathrm{H}$ and $∆\mathrm{G}$ almost remain constant with temperature. so $∆\mathrm{G}$ varies with temperature.

Case-1: when $∆\mathrm{S}=0,$ $∆\mathrm{G}$ is unaffected by T.

Case-2: when $∆\mathrm{S}=-\mathrm{ve},$ $∆\mathrm{G}$ increases with increase in T.

Case-3: when $∆\mathrm{S}=+\mathrm{ve},$ $∆\mathrm{G}$ decreases with increase in T.

$\mathrm{C}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right) \to {\mathrm{CO}}_2\left(\mathrm{g}\right) , ∆\mathrm{S}=0$

$∆\mathrm{G}$ is unaffected by T