In which of the following pairs, the outer most electronic configuration will be the same?

The incorrect statement among the following is :

What is the correct order of the following elements with respect to their density?

Given below are two statements :

Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.

Statement II : Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.

In the light of the above statements, choose the most appropriate answer from the options given below.