Write and balance the equation for this reaction: Solid magnesium reacts with aqueous silver nitrate to form solid silver and aqueous magnesium nitrate.
a) Mg + AgNO₃ -> Ag + Mg(NO₃) ₂
b) Mg + 2AgNO₃ -> 2Ag + Mg(NO₃) ₂
c) 2Mg + 2AgNO₃ -> 2Ag + 2Mg(NO₃) ₂
d) Mg + AgNO₃ -> Ag + Mg₂(NO₃) ₄