Assertion : Urea is a less toxic excretory substance when compared with uric acid
Reason : Birds and insects are uricotelic animals.

If both the assertion and the reason are true and the reason
is a correct explanation of the assertion

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If both the assertion and reason are true but the reason is
not a correct explanation of the assertion

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If the assertion is true but the reason is false

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If both the assertion and reason are false

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If the assertion is false but reason is true

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Solution

The correct option is E If the assertion is false but reason is true
Urea is more toxic than uric acid and less toxic to ammonia
Ammonia > Urea > Uric acid
Urea formation takes place in kidneys.Birds and insects are uricotelic animals.

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\to τ = \to r \times \to F b u t \to τ \neq \to F \times \to r .

Assertion (A): Steel is more elastic than rubber.

Reason (R) : Under a given deforming force, steel is deformed less than rubber.

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