Compare the ionization enthalpies of the first series of the transition metals with those of the second and third series metals

Options

1. AThe first ionization enthalpies of the third transition series are higher than those of the first and second t
2. BThe ionization enthalpies of all three series of transition metals are identical.
3. CThe ionization enthalpies of the second series of transition metals are generally lower than those of the firs
4. DThe ionization enthalpies of the third series of transition metals are generally lower than those of the first