How many sentence are correct?

$(1)$ The trophic levels in $GFC$ are unlimited

$(2)$ Organisms at each trophic level depend on those at the higher trophic level for their energy demands.

$(3)$ Plants capture only $2 -10$ percent of $PAR$.

$(4)$ All organisms are dependent for their food on producers, either directly or indirectly.

Definitions / Explanation :

$(i)$ Saprotrophs

$(ii)$ Trophic level

Choose incorrect statement

$PAR$ stands for

The green plants in an ecosystem which can trap solar energy to convert it into chemical bond energy are called