Given below are two statements:
Statement I: The number of pairs among \( [\mathrm{Al_2O_3}, \mathrm{Cr_2O_3}], [\mathrm{Cl_2O_7}, \mathrm{Mn_2O_7}], [\mathrm{Na_2O}, \mathrm{V_2O_3}] \) and \( [\mathrm{CO}, \mathrm{N_2O}] \) that contain oxides of same nature (acidic, basic, neutral or amphoteric) is \( 4 \).
Statement II: Among \( \mathrm{Na_2O}, \mathrm{Al_2O_3}, \mathrm{CO} \) and \( \mathrm{Cl_2O_7} \), the most basic and acidic oxides are \( \mathrm{Na_2O} \) and \( \mathrm{Cl_2O_7} \), respectively.
In the light of the above statements, choose the correct answer from the options given below:
