The least one among 2 3 , 2 4 5 , 8 , 3 2 is = ?

Answer: Option C

$$2\sqrt{3}={\left(4\times 3\right)}^{\frac{1}{2}}\to 12^{\frac{1}{2}}\to 12^{\frac{2}{4}}\to \text{root}4\text{of}144$$
$$2\text{root}4\text{of}5=\text{root}4\text{of}\left(5\times 16\right)\to 80^{\frac{1}{4}}\to \text{root}4\text{of}80$$
$$\sqrt{8}=8^{\frac{1}{2}}\to 8^{\frac{1}{2}}\to \boxed{\text{root}4\text{of}64}\text{smallest}$$
$$3\sqrt{2}=\sqrt{18}\to 18^{\frac{1}{2}}\to 18^{\frac{2}{4}}\to \text{root}4\text{of}324$$
$$\sqrt{8}\text{ is answer}$$