Volume of gold in the phone = 10 cm^3
= 0.00001 m^3
Density of gold = 19300 kg/m^3
1 kg mass = 2.2 pounds
Mass of 10 cm^3 of gold = 0.00001 m^3 (19300 kg/m^3)
= 0.193 kg
So
0.193 kg = 0.193 2.2 pounds
= 0.43 pounds
I think there is something wrong with the options given in the question.