It will only be valuable if proved correct so it's D
Answer : The mass of sample is, 267.5 grams.
Explanation :
Density : It is defined as the mass of a substance contained per unit volume.
Formula used :

Given:
Volume of Pb = 
Density of Pb = 
Now put all the given values in the above formula, we get the mass of Pb.


Therefore, the mass of sample is, 267.5 grams.
Its A because I did it on connexus
410g Ag
2.3*10^24 atoms
1 molcule Ag- 6.02g*10^3