Multiple choice

Which of the following are substituted purines?

a. Adenine b. Uracil c. Guanine d. Cytosine

  1. Only a and b

  2. Only a and c

  3. Only a and d

  4. Only b and c

  5. Only b and d

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option as adenine and guanine are substituted purines.