MCQOPTIONS
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				| 1. | 
                                    We group the materials for our convenience and also for some other reasons. Materials are grouped together on the basis of | 
                            
| A. | similarities in their properties | 
| B. | differences in their properties | 
| C. | both on similarities and difference in their properties | 
| D. | None of the above is correct | 
| Answer» D. None of the above is correct | |