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Question : Assertion : Biological magnification is increase in concentration of toxic substances at various trophic levels of a food chain. Reason: Toxic substances accumulated by an organism cannot be metabolized or excreted.

Answer»

both .A. and .R. are true and .R. is the CORRECT EXPLANATION of .A.. 
both .A. and .R. are true and .R. is not the correct explanation of .A..
.A. is true but .R. is FALSE.
Both .A. and .R. are false. 

ANSWER :A


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