Consider the following four statements (1-4), select the correct option stating which ones are true (T) and which ones are false (F)

(A) An organism at each trophic level depends on those at a higher trophic level for their energy demands.
(B) Each trophic level has a certain mass of living material at a particular time called the standing crop.
(C) Each trophic level has a certain mass of non-living material at a particular time called standing state.
(D) The number of trophic levels in a grazing food chain is not restricted.

	A	B	C	D
1.	T	T	F	F
2.	F	T	F	T
3.	T	F	T	F
4.	F	T	T	F