The three stes of elements are given below
(i) Boron, aluminium, gallium, beryllium
(ii) Boron, aluminium, gallium, germanium
(iii) Boron, aluminium, thallium, rubidium
Which of the above contains groups of elements whose properties are similar in many respect to group 13 elements?
A. (ii)
B. (iii)
C. (i)
D. (i) and (iii)
