Find the true statement/statements
a) In a given period `Delta_(i)H_(1)` is the lowest for an alkali metal and highest for noble gas.
b) Cs has the lowest and He has the highest `Delta_(i)H_(1)` among all elements.
c) Lowest `Delta_(i)H_(2)` among the elements of third period is for Mg.
d) The metal with the highest `Delta_(i)H_(1)` is mercury.
e) Ni (II) compounds are thermodynamically more stable than Pt(II) compounds while Ni(IV) compound are less stable than Pt(IV) compounds.

Options

A. a, b, c, d
B. a, b, c, e
C. All except e
D. All are correct