Multiple choice

Which of the following minerals is not needed by our body?

  1. Calcium

  2. Mercury

  3. Iron

  4. Iodine

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

Calcium is a major component of our bones and teeth. Iron is present as haemoglobin in blood and iodine is required for the regular body metabolism. Mercury is poisonous for our health and can lead to death even if taken in small amount.