Rate of reaction depends upon

Adding surfactants in non polar solvent, the micelles structure will look like

(a)

(b)

(c)

(d)

The variation of the rate of an enzyme catalyzed reaction with substrate concentration is correctly represented by graph

(a)
 

(b)
 

(c)
 

(d)
 

Consider the given plots for a reaction obeying Arrhenius equation $(0°C<T<300°C):$ ($K$and $E_a$ are rate constant and activation energy, respectively )

(I) 

(II) 

A sample of milk splits after $60\mathrm{}\mathrm{m}\mathrm{i}\mathrm{n}$ at $300\mathrm{}\mathrm{K}$ and after $40\mathrm{}\mathrm{m}\mathrm{i}\mathrm{n}$ at $400\mathrm{}\mathrm{K}$ when the population of Iactobacillus acidophilus in it doubles. The activation energy (in $\mathrm{kJ}/\mathrm{mol}$) for this process is closest to ______________.

$\left(\mathrm{Given}: \mathrm{R} =8.3 \mathrm{J} {\mathrm{mol}}^{-1}{\mathrm{K}}^{-1} , \ln \left(\frac{3}{2}\right)=0.4\right)$