Stomata open in the daytime due to

During stomatal opening (photoactive),which of the following does not occur?

Which of the following is $NOT$ an aim or function of transpiration?

Accessory cells of stomata are reservoirs of . . . . . . .

Read the following statements carefully and choose the right answer from the codes given below:
$I$. $PMA$ and silicon oil of low viscosity are considered as antitranspirants.
$II$. $BAP$,$NAA$,and cobalt chloride are also used as antitranspirants.
$III$. Abscisic acid $(ABA)$ affects the mechanism of opening and closing of stomata.
$IV$. Starch of guard cells is converted into $PEP$ (phosphoenolpyruvate) ions by the process of hydrolysis.
$V$. Potometer works on the principle of potential difference between the tip of the tube and that of the plant.
$VI$. Transpiration rate is directly proportional to the relative humidity.

Select the correct option regarding the factors affecting transpiration.
$I -$ Temperature
$II -$ Light
$III -$ Structure of stomata
$IV -$ Humidity
$V -$ Number and distribution of stomata
$VI -$ Percentage of open stomata
$VII -$ Water status of the plant
$VIII -$ Wind speed
Identify the external factors and internal factors respectively.