If $$I_1 = \int_0^1 2^{x^2} dx, I_2 = \int_0^1 2^{x^3} dx, I_3 = \int_1^2 2^{x^2} dx$$ and $$I_4 = \int_1^2 2^{x^3} dx$$ then

A

$$I_2 > I_1$$

B

$$I_1 > I_2$$

C

$$I_3 = I_4$$

D

$$I_3 > I_4$$