Q. Some of the mineral elements required in extremely small quantities (traces) are called microelements. Group of such elements are

• A. copper, zinc, magnesium, iron and sulfur
• B. zinc, copper, manganese, molybdenum and boron
• C. molybdenum, boron, zinc, magnesium and calcium
• D. manganese, zinc, iron, boron and calcium

Correct Answer: B