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

The mean photosynthetic rates of $C_3$ and $C_4$ plants per $dm^2$ per hour are respectively:

Which of the following processes is never affected by light in a vegetable garden?

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

In which of the following is light energy stored in the form of chemical energy?

$I.$ Photosystem-$I$ is a photosynthetic pigment system located on the appressed part of grana and thylakoids.
$II.$ Photosystem-$II$ is a photosynthetic pigment system located on the non-appressed part of stroma only.
Identify whether the given statements are correct or incorrect and choose the correct option accordingly.