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        | Engineering  :: Engineering Materials |  | 
       
        
	 
	
	 
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                |  | Identify the correct relation |  
                | | [A]. | Mass number - Atomic number = Number of neutrons | [B]. | Mass number - Atomic number = Number of protons |  | [C]. | Number of neutrons - Number of protons = Mass number | [D]. | Number of electrons outside the nucleus - Number of proton = Mass number |  
				    | [E]. | None of the above |  |  | 
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