MCQOPTIONS
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				| 1. | 
                                    Proxima Centauri, the closest star to Earth after sun is a type of ____. | 
                            
| A. | Red dwarf stars | 
| B. | Brown dwarf stars | 
| C. | Blue giant stars | 
| D. | Yellow dwarf stars | 
| Answer» B. Brown dwarf stars | |