Question

Which of the following minerals is beneficial to plants? a. Nitrogen c. Aluminum b. Mercury d. Limestone

Answer 1

I would select A. Nitrogen due to the fact Nitrogen is found in most soil samples and Aluminum and mercury are metals. Also, limestone i don't find beneficial to plants whatsoever.

Answer 2

nitrogen
aluminium and Mercury are metals and limestone ,I don't think helps plants in any way.
nitrogen is very important for plant growth