Answer: The best option to answer the question is the fourth one (letter D, "2A")
Step-by-step explanation:
The question requires us to identify the group in the periodic table that corresponds to the alkaline earth metals.
The Alkaline Earth Metals group contains the elements Berilium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra), which corresponds to the second "column" of the periodic table:
Since the Alkaline earth metals group corresponds to the second "column" of the table, we can also called it the group 2A. The best option to answer the question is the fourth one (letter D, "2A").