Match List-l with List-II:

List-I (Concepts)	List-II (Explanation)
(A) Standing state	(I) Available biomass for the consumption of heterotrophs
(B) Secondary productivity	(II) Rate of formation of organic matter by consumers
(C) Standing crop	(III) Mass of living matter in a trophic level at a given time
(D) Net primary productivity	(IV) Amount of mineral nutrients in the soil at a given time

Choose the correct answer from the options given below:

1. A (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
2. B (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
3. C (A) - (IV), (B) - (II), (C) - (III), (D) - (I)
4. D (A) - (I), (B) - (IV), (C) - (II), (D) - (III)