Leaf photosynthates are transported to other parts of higher plants through

Match the sites in column $I$ with the processes in column $II$ and choose the correct combination from the options:

Column $I$	Column $II$
$A$. Grana of chloroplast	$1$. Kreb's cycle
$B$. Stroma of chloroplast	$2$. Light reaction
$C$. Cytoplasm	$3$. Dark reaction
$D$. Mitochondrial matrix	$4$. Glycolysis

In which of the following is oxygen $NOT$ produced during photosynthesis?

Plants in which the first product of $CO_{2}$ fixation is $C_{3}$ acid,i.e.,the ...$A$... pathway,and those in which the first product was $C_{4}$ acid $(OAA)$,i.e.,the ...$B$... pathway. Complete the given statement by filling appropriate options in the given blanks.

The most vital process for the existence of life on earth is

$I.$ In $C_{3}$-plants,the Calvin pathway takes place in mesophyll cells.
$II.$ In $C_{4}$-plants,the Calvin pathway takes place in the mesophyll cells.
Which of the following statements is true?