Multiple choice

Which of the following substances is/are elements? a. Nitrogen b. Carbon c. Potassium Permanganate d. Mercuric Oxide

  1. Only a

  2. Only b

  3. Only c

  4. Both a and b

  5. Only d

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

This is the correct answer, as these are elements.