The Earth Summit held in Rio de Janeiro in \(1992\) was called

A to reduce \(CO_{2}\) emissions and global warming.
B for conservation of blodiversity and sustainable utilization of its benefits.
C to assess threat posed to native species by invasive weed species.
D for immediate steps to discontinue use of \(CFCs\) that were damaging the ozone layer.

Verified Solution

Answer & Solution

Correct Answer

(B) for conservation of blodiversity and sustainable utilization of its benefits.

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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List \(I\)	List \(II\)
\(A.\) Pleurobrachia	\(I.\) Mollusca
\(B.\) Radula	\(II.\) Ctenophora
\(C.\) Stomochord	\(III.\) Osteichthyes
\(D.\) Air bladder	\(IV.\) Hemichordata