| 281. | 
                                 
                                     = _____ + c
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (b)  | 
                    
| 282. | 
                                 
                                     = _____ + c
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (c)  | 
                    
| 283. | 
                                 
                                     = _____ + c
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (a)  | 
                    
| 284. | 
                                 
                                     _____ +c.
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (b)  | 
                    
| 285. | 
                                 
                                     _____+c.
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (b)  | 
                    
| 286. | 
                                 
                                     _____+c.
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (c)  | 
                    
| 287. | 
                                 
                                     _____+c.
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (c)  | 
                    
| 288. | 
                                 
                                     _____+c.
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (c)  | 
                    
| 289. | 
                                 
                                     _____.
                                 
                            
  | 
                    ||||||||
| 
                             Answer: 
                                Option (a)  | 
                    
| 290. | 
                                
  | 
                    ||||||||
| 
                             Answer: 
                                Option (b)  |