Statement-1: Avogadro’s number was proposed $6.019\times {10}^{23}$ on O-16 scale and $6.02\times {10}^{23}$ on C-12 scale.                                        
Statement-2: The number value of Avogadro’s number depends upon the atomic mass scale. 

If  both statements are true  and statement-2 correct explanation of  statement-1

If  both statements are true  and statement-2 is not  correct explanation of  statement-1 

Statement-1 is true and statement-2 is false 

Statement-1 is false statement-2 is true