А. They belong to the same group of the periodic table.
Explanation:
Two elements possess similar chemical properties if they belong to the same group on the periodic table.
What determines the chemical properties of elements;
→ the number of valence electrons an element contains determines its chemical properties.
On the periodic table, groups are vertical arrangement of elements. Periodic groups classifies elements into groups based on the number of valence electrons they contain. So, elements in the same group will have the same number of valence electrons and hence similar chemical properties.A=dermal
B=vascular
C=ground