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Match the following.
Column-I Column-II
A) Productivity i) Rate of formation of new organic matter by consumers
B) Biosphere primary productivity ii) 170 billion tons /year
C) GPP-R iii) gm^-2 yr^-1
D) Secondary productivity iv) NPP
A B C D
(1) i iii iv i
(2) iii ii i iv
(3) ii iii i iv
(4) iii ii iv i

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answer is D.

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Detailed Solution

Productivity	gm^-2yr^-1
Biosphere primary productivity	170 billion tons / year
GPP-R	NPP
Secondary productivity	Rate of formation of new organic matter by consumers

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