MCQOPTIONS
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				| 1. | 
                                    Which of the following chemicals is not used in photographic processing? | 
                            
| A. | Silver halide | 
| B. | Ammonium thiosulphate | 
| C. | Copper nitrate | 
| D. | Both [a] and [b] | 
| Answer» D. Both [a] and [b] | |