(I) [Borax powder] overset("Heated")underset("strongly")rarr ubrace('A'+'B')_("Transparent glassy bead")+H_(2)O (II) B +CuO overset(Delta)rarr 'C' (Blue mass) (III) A +'C' +C ("coke") overset(Delta)rarr 'D' + 'E' +CO (uarr) Compound 'C' may be:

(I) [Borax powder] overset("Heated")underset("strongly")rarr ubrace('A

1.	(I) [Borax powder] overset("Heated")underset("strongly")rarr ubrace('A'+'B')_("Transparent glassy bead")+H_(2)O (II) B +CuO overset(Delta)rarr 'C' (Blue mass) (III) A +'C' +C ("coke") overset(Delta)rarr 'D' + 'E' +CO (uarr) Compound 'C' may be:
Answer» `Cu(BO_(2))_(2)` `B_(2)O_(3)` `CuBO_(2)` `NaBO_(2)` Answer :A