A c c o r d i n g   t o   t h e   N C E R T ,   o p t i o n   a   a n d   b   b o t h   a r e   c o r r e c t .   P l e a s e   g i v e   m e   a p p r o p r i a t e   a n s w e r Q 3 :   W h i c h   o f   t h e   f o l l o w i n g   f u n c t i o n s   i s   a t t r i b u t e d   t o   c a r b o n i c   a n h y d r a s e ? A .   P r o d u c t i o n   o f   c a r b o n i c   a c i d s B .   P r o d u c t i o n   o f   b i c a r b o n a t e   i o n s C .     T r a n s p o r t a t i o n   c f   c a r b o n   d i o x i d e   g a s D .     B r e a k d o w n   o f   c a r b o n i c   a c i d s   i n t o   C O 2   a n d   w a t e r A n s .   C a r b o n i c   a n h y d r a s e ,   p r e s e n t   i n   r e d   b l o o d   c e l l s ,   p r o d u c e s   c a r b o n i c   a c i d s .   C a r b o n i c   a n h y d r e s e   i s   s p e c i f i c   f o r   i t s   s u b s t r a t e .   I t   s p e c i f i c a l l y     c o m b i n e s   C O 2   a n d   w a t e r   m o l e c u l e s   t o   f o r m   c a r b o n i c   a c i d s . T h e   c o r r e c t   a n s w e r   i s   A      

Dear student,      
Please find below the solution to the asked query                                                              

Yes, you are correct. The function of carbonic anhydrase enzyme is to convert carbon dioxide into carbonic acid and facilitate its transportation. It also produces bicarbonates. But in such questions, you need to give priority to the primary function of the enzyme. 
As far as the primary function of this enzyme is concerned, it is the production of carbonic acids. Hence, option (A) is more appropriate here. 

Hope this information will clear your doubts about the topic.   
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Regards                          

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