Which of the following elements in $+1$ oxidation state has the largest ionic radius?

Given below are the pairs of group $13$ elements showing their relation in terms of atomic radius: $(B < Al)$, $(Al < Ga)$, $(Ga < In)$ and $(In < Tl)$. Identify the elements present in the incorrect pair and in that pair,find out the element $(X)$ that has a higher ionic radius $(M^{3+})$ than the other one. The atomic number of the element $(X)$ is:

Which of the following properties displays a progressive increase down a group in the periodic table?

$A$ trend common to both groups $I$ and $VII$ elements in the periodic table as atomic number increases is

Which one of the following indicates the correct order of atomic size of the given elements?

The correct order of ionic radii for the given species is: