Ballast elements are

A. Al & Si

B. Al & Mg

C. Mg & Fe

D. Si & Fe

Answer: Option A

Solution(By Examveda Team)

Ballast elements are those elements that refuse to attribute any useful metabolic function to these elements as they are available in large amounts in plant tissues and the plants can be grown perfectly normally without them.
Aluminium (Al) and Silicon (Si) are such elements that are present in abundance in plants and their absence may not harm the growth of the plants thus called Ballast elements.