Assertion : Plants absorb nitrogen in the form of nitrates only.
Reason : Nitrogen is the most critical element.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If the assertion is false but the reason is true

Answer

D

Explanation

Plants absorb nitrogen from the soil in the form of nitrate `(NO_3^(-))` and ammonium `(NH_4^(+))` In aerobic soils where nitrification can occur, nitrate is usually the predominant form of available nitrogen that is absorbed.
Nitrogen is one of the major constituents of proteins, nucleic acid, vitamins, and hormones. This is the mineral element required by plants in the greatest amount.