If GCD(a,b)=g\text{GCD}(a, b) = gGCD(a,b)=g, which of the following expressions is equivalent to LCM(a,b)\text{LCM}(a, b)LCM(a,b)?
a+bg\frac{a+b}{g}ga+b
a⋅bg\frac{a \cdot b}{g}ga⋅b
a⋅b⋅ga \cdot b \cdot ga⋅b⋅g
a⋅b\sqrt{a \cdot b}a⋅b