As a general trend the First Ionization Energy $$IE_1$$ of elements decreases on moving down in a group in the periodic table. Keeping the observation in mind select the correct order of elements with respect to their $$IE_1$$.
I. Li>Na>K>Rb>Cs>Fr
II. Li>Na>K>Rb>Cs<Fr
III. Sr<Ba>Ra
IV. Sr>Ba<Ra
V. Cu>Ag>Au
VI. Cu>Ag<Au
VII. Cd>Hg
VIII. Cd<Hg

A

I, V, VII

B

II, IV, VIII

C

III, V, VII

D

II, VI, VIII