The correct graph between surface tension T and temperature  $\mathrm{\theta }$ in low temperature range is

The variation in surface tension with temperature for small temperature differences is given by

${\mathrm{T}}_{\mathrm{t}}={\mathrm{T}}_{\circ }(1-\mathrm{\theta t})$

Where

${\mathrm{T}}_{\mathrm{t}}= \mathrm{surface} \mathrm{tension} \mathrm{at} {\mathrm{t}}^{\mathrm{o}} \mathrm{C}$

${\mathrm{T}}_{\mathrm{o}}=\mathrm{Surface} \mathrm{tension} \mathrm{at} 0^{\mathrm{o}} \mathrm{C},$

$\mathrm{\theta }=\mathrm{Temperature} \mathrm{coefficient}$

The above equation has a linear graph with negative slope.