Correct Answer: i-a, ii-c, iii-b, iv-d

Solution : The correct answer is i-a, ii-c, iii-b, iv-d .

Here's the matching of elements in Column A with their respective groups in Column B:

i. Na-aa. Alkali metal

• Sodium (Na) belongs to the alkali metal group in the periodic table.

ii. Cu-cc. Transition metal: copper (Cu) is a transition metal.

iii. Mg: b. Alkaline earth metal: Magnesium (Mg) belongs to the alkaline earth metal group.

iv. He; d. Zero group element: Helium (He) is a noble gas and belongs to the zero group (or noble gases) in the periodic table.