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Solution


Q.

Assertion: Aerobic animals are not truly aerobic.
Reason: They produce lactic acid anaerobically.
1 Both assertion and reason are correct and reason is the correct explanation of assertion.  
2 Both assertion and reason are correct but reason is not the correct explanation of assertion.  
3 Assertion is true but Reason is false.  
4 Assertion is false but Reason is true  

Ans.

(2)

In most animals, tissue oxidation is carried out by aerobic respiration. But sometimes in aerobically respiring organisms, anaerobic metabolism takes place in certain tissues like skeletal muscles which do not get as much as required oxygen and produce lactic acid.