Anoxygenic photosynthesis is characteristic of

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

Out of the two statements given here $:-$
$(A) \ C_4$ plants are more effective in productivity as compared to $C_3$ plants.
$(B) \ C_3$ plants show photorespiration at high $CO_2$ concentration.

Which of the following photosynthetic bacteria possess both $PS-I$ and $PS-II$?

All food substances essential for life are obtained through ...... .

Provide the full names for the following abbreviations:
$(1)$ $PGA$
$(2)$ $OAA$