MCQOPTIONS
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				| 1. | 
                                    Protons and neutrons are bound in a nucleus by the [NDA] | 
                            
| A. | short range 'weak interaction' | 
| B. | short range 'strong interaction' | 
| C. | long range 'electromagnetic interaction' | 
| D. | long range 'gravitational interaction' | 
| Answer» C. long range 'electromagnetic interaction' | |