TS EAMCET Engineering 12 May 2023 Shift 1 Solved Paper

What are the correct statements about the elements of group 13 given below?
I) The stability of +1 oxidation state follows the order Tl>In>Ga
II) Boron has the lowest melting point and boiling point as it is a non-metal
III) Boron shows a maximum covalency of 4 in its compounds
IV) The order of atomic radius is Ga>Al>In
V) Aluminium is passive to concentrated nitric acid