To solve this problem, we need to determine the correct statement about the pairing of adenine and thymine in DNA.$\newline$Let's analyze each option:$\newline \bullet$Option 1: Adenine pairs with thymine through one H-bond.$\newline$ - This is incorrect because adenine and thymine form more than one hydrogen bond.$\newline \bullet$Option 2: Adenine pairs with thymine through three H-bonds.$\newline$ - This is incorrect because adenine and thymine do not form three hydrogen bonds.$\newline \bullet$Option 3: Adenine does not pair with thymine.$\newline$ - This is incorrect because adenine does pair with thymine in DNA.$\newline \bullet$Option 4: Adenine pairs with thymine through two H-bonds.$\newline$ - This is correct because adenine and thymine form two hydrogen bonds in DNA.$\newline$Therefore, the correct statement is:$\newline$Adenine pairs with thymine through two H-bonds.$\newline$This corresponds to Option 4.