The correct option is A.
All the elements in group 1 and hydrogen has only one electron in their outermost shells, thus, they all have similar electron configuration. The elements int the periodic table are grouped in such a way that, all elements in the same group have the same number of electrons in their outermost shells. This is one of the principal reason why hydrogen is grouped with group 1 elements.<span />
Mineral resource : It is the source of any material in earth's crust. The source from which there is opportunity of extraction of the material.
Mineral reserve : The mineral resource from which a material can be extracted by means of economic techniques. The ores of metals are generally considered to be mineral reserve.