Given a=23⋅32a = 2^3 \cdot 3^2a=23⋅32 and b=22⋅34b = 2^2 \cdot 3^4b=22⋅34, which of the following expressions represents GCD(a,b)\text{GCD}(a, b)GCD(a,b)?
22⋅322^2 \cdot 3^222⋅32
23⋅342^3 \cdot 3^423⋅34
25⋅362^5 \cdot 3^625⋅36
22⋅342^2 \cdot 3^422⋅34