Subject :ICSO     Class : Class 5 
                                                                        Subject :ICSO     Class : Class 6 
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Subject :ICSO     Class : Class 5 
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Subject :ICSO     Class : Class 7 
                                                                        Ans 1:
Class : Class 9 
                                                                                                    
                                                                                                    glucose ........without the use of oxygen becomes alchohol + energy + carbon -di-oxide
                                                                                                
                                                                                                Ans 4:
Class : Class 10 
                                                                                                    
                                                                                                    glucose ------------without use of oxygen--------------carbon dioxide + alcohol + energy
                                                                                                
                                                                                                Ans 5:
Class : Class 9 
                                                                                                    
                                                                                                    glucose ........without the use of oxygen becomes alchohol + energy + carbon -di-oxide
                                                                                                
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Subject :ICSO     Class : Class 7 
                                                                        Ans 8:
Class : Class 10 
                                                                                                    
                                                                                                    i think it should be (d), because the question says Sarika's brother (which can be mayank as it is clearly stated mayank's sister sarika) or if she has another brother, his niece.
                                                                                                
                                                                                                Ans 15:
Class : Class 10 
                                                                                                    
                                                                                                    D) Niece or daughter
If Sarika has only one brother, then that is Mayank. Then if She is his  daughter, then the answer is A.
But if Sarika has a brother other than Mayank??
Then it will be B. Because daughter of sister is niece.
So the complete option ---> A + B = ~C~ NO! D.
D)Niece or daughter.
Hence proved.
                                                                                                
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Subject :ICSO     Class : Class 4 
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Subject :ICSO     Class : Class 5 
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Subject :ICSO     Class : Class 6 
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Subject :ICSO     Class : Class 2 
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Subject :ICSO     Class : Class 2 
                                                                         
             
             
        