Who proposed the 'law of limiting factor' as the 'law of minimum'?

$A$ plant is kept in $300 \, ppm$ $CO_2$ concentration. What will happen to it?

Beyond the saturation point,the rate of photosynthesis begins to decline because of:
$I$. Photo-inhibition
$II$. Photo-oxidation
$III$. Photo-reduction
Select the correct option:

The excess amount of $CO_2$:

$A-$ The $C_3$ and $C_4$ plants respond differently to $CO_2$ concentrations.
$R -$ The concentration of $CO_2$ in the atmosphere is between $0.03$ and $0.04$ percent. An increase in concentration up to $0.05$ percent can cause an increase in $CO_2$ fixation rates.

With reference to factors affecting the rate of photosynthesis,which of the following statements is not correct?